Soul really liked the FF protagonists (Squall, Cloud, Zack, Tidus, Yuna, etc.). And they do show Kris some other JRPG stuff (Chaz from Phantasy Star, Crono from Chrono Trigger, Fayt from Star Ocean, Lenneth/Alicia from Valkyrie Profile). Soul also followed some Touhou protagonists to give them extra determination through bullet hell. They regularly train Kris in bullet hell segments as well in dream sequences.