SentToOblivion
Go for the milf/older girls Yasaka Gabriel Grayfia Serafall Vanellana Rossweise Younger girls Kuroka Lavinia Suzaku Natsume Nanaderu Ravel. It was a shame in the canon that she is paired with Issei and got overshadowed by Rias. In my view, she is much better than Rias as she is smart like Sona but less arrogant.
If you are still taking requests (and I will limit this to only DxD as we don't know what other worlds Ava has merged yet), I can still see several of the younger ones being added: 1. Yasaka - 9 fluffy tails. Think about that. 9 FLUFFY, Pillow soft tails. 2. Sona - She never gets enough love in my books. Complete the set with Serafall, have MC beat her at chess and then part of the bet is she has to wear Magical Girl clothes for Serafall. 3. Rossweisse - Spare her from Odin. 4. Kuroka - MC shows the evidence to spare her, she goes full kitten mode. 5. Shirone - Because MC saved her sister, she goes with her. 6. Venelana - Mentioned this on another FF, have the MC show her love and compassion. Many theories have it her husband has been cheating on her and treating her like garbage. MC can heal her. 7. Lady Phenix (Can never remember her name) - Same as Venelana. 8. The three fallen angels from the beginning. Make them maids.