Right now that's all the content there is for her. Sometimes she'll have different reactions to you entering her chamber depending on how your last fight ended, but aside from that once you've beaten the dungeon you can't really advance further.
That's not true. After beating her a number of times you can visit her by going to "Sofia's domain" and selecting her. Progression with her continues as a friends with benefits (as far as i got) where you can give her eros to help her get out of debt so she can quit being an obstacle in the dungeon.