User blog comment:DoomFest/Thumbnails / Death Battles ideas/@comment-26561766-20150927091235/@comment-2218433-20150927093008

alright, here's an attempt of mine: (From top to bottom)

Tifa Lockhart (good idea on using the Kingdom Hearts design)

Ling Xiaoyu (Street Fighter x Tekekn design, also a good idea)

and finally,

Ruby Rose (RWBY)

Taking a wild guess here and saying the blue shadow below Ruby is possibly King (Tekken)