Submitting all of these on the behalf of Xiao, who quit osu 2 years ago.
Skin name: League of Legends
Game modes skinned: STD
Game modes skinned: STD
Skin name: osu! Fantasy VII
Game modes skinned: STD
Game modes skinned: STD
Skin name: IIDX osu! Happy Sky
Game modes skinned: STD
Game modes skinned: STD