User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-82.160.23.173-20180626202008/@comment-26709288-20180704160808

Compared to Rias's team sona is lacking in experience. I mean Rias had to defeat her fiancee (a experienced high class devil at that) in a rating game meanwhile Sona simply had to defeat her own in a game of chess. Rias and her team had to fight a cadre class fallen angel while she simply protected them with a barrier. she was completely useless when the khans brigade attacked the peace conference. She was kind of useful during Loki incident but I say that loosely.

Honestly I kind of hate Sona being the rival. Compared to Rias she's underdeveloped and lacks in power. Like look at Vali and Issei, even though Issei is m.c. Vali actually had some development and he still one up Issei in some aspects (him being a ultimate class devil and declared the strongest white dragon emperor in all past, present, and future). I just wish they would've made Sona much better.

The only thing Sona has over rias is better technician but even then, Rias is capable of one upping her during the rating game. Also Sona possesses water power meanwhile Rias possesses the power to turn matter into dust.

Not really adding to this conversation but here's my 2 cent on Sona.

While I agree with you demonicjester, strategy is only useful when you have the power to back it up.