User blog comment:DeathGodPrayer/Talk About What You Want!/@comment-85.154.148.148-20140118130924/@comment-16281343-20140118134025

And why would you suggest Kiba?

Rias treats Kiba as his younger brother.

He also treated Issei like that at the beginning to some extent. Rias didn't fell in love at first sight with Issei. -_-