User blog comment:DeathGodPrayer/Talk About What You Want!/@comment-4547267-20140119041452

You know in a way most of Issei harem are like the Seven Deadly Sins.

Rias - Wrath: Because she get the most jealous and wanted to keep Issei all to herself out of the rest.

Akeno - Lust: No need to explain lol

Asia - Envy: She always wanted to apart of the dirty thing the girls do with Issei because she feels left out.

Koneko - Gluttony: She seem to eat more than the rest.

Xenovia - Pride: As a swordmen.

Ravel - Greed: Don't know maybe being a noble or a manager of Issei.

Ophis - Sloth: Despite still being more powerful than the Two Heavly Dragon, she still kind of doesn't do anything.