Gasper Vladi/Relationships

Issei Hyoudou
When Gasper and Issei first met, Issei thought that he was another girl and was heartbroken after learning that he was a cross-dressing boy. Issei often cursed him for being a shut-in, although Issei and Gasper became great friends and Issei trains him as his junior. Issei's blood gives Gasper a boost in power, even making him able to hit his Sared Gear's Balance Breaker for a short time. When Issei died in Volume 11, he, like the other members in the Gremory team, became very sad, but gained hope and defeated Georg afterwards after revealing his new power.

Rias Gremory
Rias found him after his death and took pity on the boy, reincarnating him into a Devil through the use of a Bishop Mutation Piece. Rias has shown great patience with Gasper and his various discomforts, but later assigns Issei to help him get over them.

Koneko Toujou
Koneko has been shown to enjoy teasing Gasper calling him "Gya-kun". During his training, she chased him around while holding garlic.