|“||My name is Rossweisse. I will be under your care during our stay in Japan. Nice to meet you all.||”|
Rossweisse is one of the many female protagonists of High School DxD. A former bodyguard for Odin, she is currently acting as the Civics teacher at Kuoh Academy and Class 3-B's homeroom teacher. She was formerly Rias Gremory's second Rook, alongside Koneko Toujou, but now serves as Issei Hyoudou's first Rook and is one of his fiancées.
Rossweisse is a beautiful young woman with long, straight silver hair and aqua-colored eyes who appears to be in her late teens. Her body measurements are [B96-W61-H89 cm] [B38-W24-H35 in]; height is 173 cm (5 feet 8 inches) and body weight is [59 kg].
Her battle attire is normally of a set of Valkyrie armor, which consists of a white breastplate with gold and pale blue accents and matching, fingerless gauntlets, boots, hip guards, and wing-shaped hair clips. She also wears a black leotard underneath her breastplate, black thigh-high stockings, and a pale blue cloth wrapped underneath her hip guards, all of which are clad with pink lacing along with her hair clips.
For her teaching position at Kuoh Academy, she wears a simple business suit and skirt. When she is not at work, she is noted for often wearing cheap, plain jerseys. It was pointed out by Euclid that Rossweisse has a strong resemblance to his sister, Grayfia, as both of them have silver hair.
Rossweisse is known to be a very serious person, acting professional prioritizing work and study above all else since her youth, this however, caused her to miss out on romance, thus is extremely bitter and sensitive about not having a boyfriend and is quick to anger or sadness when made fun of. She has taken a liking to her role as a teacher in education for her students, making sure they understand her lessons and helping them whenever they're in a bind and is appreciated for it. Rossweisse has little tolerance for those who behave unprofessionally, especially for lewd acts at inappropriate times. When she lectures them on standards, they usually retort with her simply being jealous. This may have some truth to it as on numerous occasions she has expressed interests in doing perverted things with her future boyfriend, she also desires her lover to be financially stable with a bright future.
Despite her seriousness, she is stated to be clumsy and has a tendency to make rash decisions without informing anyone. She is highly susceptible to alcohol as one drink from it can leave her drunk and vomit for extended periods of time. Rossweisse has a lot of repressed baggage from upholding her uptight and modest demeanor which goes out the window when drunk and begins opening her true thoughts and frustrations. She also has a compulsion to buy things at sales when they're cheap, showing enthusiastic excitement whenever she goes to 100-Yen shops, causing Issei to dub her "The 100-Yen Shop Valkyrie". Rossweisse also has a tendency to speak using her country's accent when she is flustered.
Like the other girls, Rossweisse acts like someone her age whenever she is on a date with Issei as she ended up acting shy when she was called cute. She soon develops romantic feelings for Issei in Volume 17 when he proclaimed to her that he will protect her from Euclid, which he did.
After falling in love with Issei and becoming engaged to him, Rossweisse has started to partake in perverted activities she normally frowns upon, such as wanting him to apply suntan oil on her, sleeping with him while wearing revealing lingerie and fighting with the other girls over him.
Rossweisse was raised in the countryside by her grandmother, Göndul, as both her parents are warriors who serve the Norse Gods and rarely come home. Rossweisse was born into a house that specializes in three types of spiritual magic known as the rune, gandol, and seiz styles that have been down through her family generations. While still a child, Rossweisse went through several ceremonies that were meant for her to inherit her family's magical crest, but she wasn't able to inherit it, and her cousin ended up receiving the position as the family head instead. She previously had difficulty living up to her families expectations due to Rossweisse's incompatibility with the magic seiz-style.
As a consequence of trying to make up for her perceived shortcomings in magic, Rossweisse's school life was completely academic, to the point that she did not have a social life and looked down on her classmates that rarely spent any time studying, which contributed to Rossweisse's rapid grade skipping through high-school and college and her degrading nickname, "The Valkyrie that's never had a boyfriend."
Her talent in other fields grew exponentially enough to surprise her parents, however, it was still not enough to live up to everyone's high standards, yet after all this time, her clan was still very understanding as they did not blame or criticize her for her shortcomings.
While in college, Rossweisse wrote an essay about Trihexa but never published it. Regardless, she is considered to be a sought-after expert on the creature by Qlippoth. While working as a Valkyrie, she had trouble finding souls of heroes to bring to Valhalla. At some point before the series, she was appointed as Odin's bodyguard. During her time with Odin, Rossweisse was basically used as a maid by Odin, taking care of him during his trips, supporting Odin with his daily life, despite her small salary, and was even mistreated by her fellow Valkyries who called her Odin's "Servant Girl".
Powers & Abilities
Demonic Power: As a Devil, Rossweisse has the power common to a Devil, which allows her to cast spells and special phenomena. However, instead of using demonic powers to cause different phenomena, she prefers to use calucations rather than using her imagination.
Immense Magic Power: As Odin's former bodyguard, Rossweisse has considerable magic power enough to be recognized for her position. In Vol 11, Azazel noted her powers equals that of a High-Class Devil despite her not being a Bishop. In Vol 25, even the Strongest Valkyrie, Brynhildr has recognized that even without Mistilteinn, her magic power already surpassed hers.
Enhanced Strength: As a Valkyrie, she has higher physical abilities than a normal person, which was raised after being reincarnated into a Rook.
Enhanced Durability: Rossweisse has enhanced defenses befitting her status as a Rook.
Master Magician: Rossweisse is highly proficient in Norse magic, specializing in offensive magic, the most being her Full Burst, a bombardment of magic of all attributes and types. Her offensive power is noted to exceed that of Rias and Akeno. She can teach others as she taught Asia about the basics of summoning magic and other kinds of magic. Le Fay stated the magic circles Rossweisse uses is self-invented and intricate, which only experts can use, but hers is high level. Her magic talent is formidable enough to theorize a sealing spell powerful enough to seal Trihexa, which caused Euclid to compliment her magic skills as being not inferior to her grandmother who's a famous magician. Rossweisse can strengthen her magic using Mistilteinn, which allowed her to overpower Brynhildr and Akeno.
- Elemental Magic: She notably excels in the use of ice, fire, water, lightning, wind, thunder, light, and explosive-based magic. It is noted that she has inherent talent at studying and learning offensive magic. Rossweisse has demonstrated great offensive power with this magic, as she was able to finish off several Midgardsormr clones after they were weakened and knock down Sairaorg Bael after he let his guard down, despite him being enveloped in Touki.
- Defensive Magic: Upon returning from her training in Valhalla in Vol 12, Rossweisse starts to use defensive spells (using the trait of Rook), which are strong enough to easily shield against Balance Breakers that specialize in destructive power. She also learned defense magic to negate the adverse effect of touching holy objects such as Holy Swords and the Holy Bible for a short period of time. As seen when she used two of Xenovia's Excalibur fragments (Transparency and Mimic) by putting multiple layers of defense magic on her hand during the Rias-Sairaorg Rating Game match and reading a Bible without suffering a severe headache.
- Sealing Magic: Rossweisse can also use sealing magic, which she learned by researching the information about Trihexa. Used in conjecture with barrier magic, she can seal the movements of mass-produced Evil Dragons in Vol 19 by studying Asia's Evil Dragons. After modifying her technique, her sealing barrier technique was used by Three Factions to seal the Emperor Beast of Apocalypse. She could also use it in combat to seal her foes. Her barrier was even effective against Armaros, the Grigori anti-magic specialist although she needed time to prepare a stronger barrier as his anti-magic abilities could destroy a half-baked barrier. In Vol 25, Rossweisse, by enhancing her power with Mistilteinn, could use her Barrier magic to seal off entire areas to prevent her foes from escaping.
- Teleportation Magic: Rossweisse is proficient in teleportation magic.
- Summoning Magic: While she does not excel at it, Rossweisse possesses knowledge in summoning magic as she was capable of teaching Asia the basics of summoning magic.
- Strengthening Magic: In Vol 22, Rossweisse can use physical enhancement magic to enhanced her own physical abilities such as increasing her speed. In Vol 23, she could enhance the physical abilities of the entire Team Red Dragon Emperor of the Blazing Truth team.
- Hypnosis Magic: In True Vol 1, Rossweisse can use hypnotism magic on Ingvild Leviathan to lose consciousness.
- Security System Magic: Rossweisse has some level of skill with Security System magic, as she tried to use it to undo the technique placed on Issei.
- Black Magic
- White Magic
- Clothing Manipulation: Rossweisse is capable of using magic to altering her attire, changing from her formal suit into her Valkyrie armor.
Flight: Before she was reincarnated, Rossweisse could fly via magic like Loki could. After being reincarnated as a Devil, Rossweisse can now fly using her devil wings.
Mistilteinn Wand (ミスティルティンの杖, Misutirutin no tsue): This is an old looking, but powerful wand, which has powerful magic inside it, meant for god-class beings from the Norse World. Despite not mastering it yet, Rossweisse could use it to further strengthen her already powerful magic; increasing her defensive magic able to deflect Brynhildr's magic sword and her magic bombardment, which retired the Chief-Valkyrie in a single attack.
Rook Piece (戦車の駒, Sensha no koma): Rossweisse was reincarnated using the Rook Piece, which grants her enhanced offense and defense. Although, she used its defensive traits to strengthen the effectiveness of her defensive barriers.
- (To Issei): "Hey, Ise-kun. If I ever get used by them……will you please kill me?" (Volume 17, Life 2) 
- (To Issei): "……If I was to be used by them to hurt my comrades and cause trouble to this world, I would rather choose death. I won’t be able to endure everyone dying for someone like me…… " (Volume 17, Life 2) 
- (To Issei): "......Y-Y……You looked heroic. A-A-Also……I was happy back then. For coming after me……" (Volume 17, New Life) 
- (To Issei): "……N-Next time……let’s go to a……two-hundred yen shop. No, will you please go with me?" (Volume 17, New Life) 
- (To Vidar while drunk): "I! Will become Hyoudou Issei-kun’s! Wife! It’s the pwomising Oppai Dragon, you know? It means I will be married to a rich man with power! And on top all that, he is also kind to me!" (Volume 25, Life 1) 
- (To Vidar while drunk): "Even though that might be the case, Ise-kun is…someone who will do anything for my sake! He might be younger, but he is a master who is dependable! For my sake…He risked his own life to save me, after all! He immediately came to my rescue when that sister-loving bastard Euclid kidnapped me! I was so happy! Uwaaaaaaaaaaaa!" (Volume 25, Life 1) 
- (To Issei): "I don’t want to…marry Vidar-sama. I…want to be by your side...Will you snatch me away from Vidar-sama?" (Volume 25, Life 3) 
- (To Issei) "I WILL GIVE BIRTH TO YOUR CHILD! PLEASE LET ME GIVE BIRTH TO MANY OF ISE-KUN’S CHILDREN!" (Volume 25, Life.DxD vs Life.GOD —Red Dragon—) 
- (Upon defeating Brynhildr) "When it comes to offense, defense and support, I fall behind you in the degree of perfection in all aspects of magic. However, I won’t lose when it comes to barrier magic! Because this is the power that I gained after meeting my comrades!" (Volume 25, Life.DxD vs Life.GOD —Red Dragon—) 
- (To Issei) "Ise-kun! N-Next time, let’s watch the real world tree Yggdrasil…" (Volume 25, Life.DxD vs Life.GOD —Red Dragon—) 
- (Drunk Rossweisse during the party) "Ise-kun iwf my hufband! I won’t hand him over to anyone!" (Volume 25, New Life) 
- Rossweisse's birthday is on August 8th.
- Rossweisse is the name of one of the Valkyries featured in Richard Wagner's opera Der Ring des Nibelungen (The Ring of the Nibelung).
- Rossweisse from German, (Roßweiße) means "white rose".
- Rossweisse is the only child of her parents.
- Rossweisse, being a Valkyrie, is said to be a "Half-God".
- Despite being in her late teens, she has already finished high school and most of college in Valhalla.
- In the future, Rossweisse has stated that she wants to establish a Norse magic school in the Gremory territory, and start a business training new Valkyries out of female Devils.
- Rossweisse's dream is to build a discount store in her homeland which has every good imaginable.
- She held the record for the longest duration of being Odin's escort.
- In Rating Game fighting-types, Rossweisse is considered a Wizard-type closer to a Technique-type.
- Issei called her "Moving Cannon" due to the fact that she is a wizard-type Rook.
- Rossweisse is shown to be unable to inherit the magic of her family, which forced her cousin to inherit it.
- However, Rossweisse has shown to have an inherent talent at learning offensive magic.
- Rossweisse's job requests as a Devil are mostly related to housewives, to whom she gives financial advice and acts as their consultant. She also teaches them methods to ease their worries and win in bargain sales.
- Rossweisse reviews and presents 100 yen merchandise on DeviTube. Her videos are a huge hit with the underworld citizens.
- Rossweisse is the third female character to be placed into an engagement, the first being Rias, and second, being Kiyome Abe. Among these girls, she is the only one who didn't fall in love with Issei after he saved her as she already loved him before the engagement.
- Rossweisse has a driving license.
- One of Rossweisse's romantic dreams was to go on a driving date with a guy, which she finally fulfilled with Issei.
- In the dub, Rosswiesse is pronounced "Rossvisa" by Issei, Asia, and Azazel.
- In the "DxD" popularity election, she ranked seventh in the all-character category and seventh in the heroine category.
- Light Novel Volume 15, Life.1 Magical Girl Ria☆ For Real!?
- Light Novel Volume 17
- Light Novel Volume 25
- Ishibumi's twitter
- Light Novel Volume 17, Life.2 The School of the Underworld!
- Light Novel Volume 7, New Life
- Light Novel Volume 9, Life.1 Yeah, let’s go to Kyoto!
- Light Novel Volume 14, Life.4 Go, Occult Research Club & Student Council!
- Light Novel Volume 13, Extra Life
- Gremory of the DeviTube
- Light Novel DX.3, Extra Life.2 Graduation Trip and Vortex Bunch
- Dragon Magazine May Issue 2021