User blog comment:B214/General Discussion/@comment-24098614-20170331211533/@comment-30924344-20170331213158

Roygun is helping Issei to be able to still participate in the Rating Games as that is her hobby, the thing she loves doing. Yeah it's for her personal interest, but both she and Issei have a mutual benefit from this. Roygun gets to still partake in her hobby, while Issei gains an advisor who will help him win future games. Win win. Her flirting with him is just because her preference in men is guys like Issei and since she is openly fliratious, she naturally will flirt with him.