No, that's definately Sashiromiya Sasha. But who's the second? I've seen her on early "Soku" arts. She might have become a new hero, but, unfortunately, she haven't.
The second one is one of the fan-characters made before Hisoutensoku came out. I don't know her name, but she has a gear around her waist, to go with the more mechanical theme of Hisoutensoku's HUD.
I dont know anything about fan characters, but it seems like the last 3, judging by their number, are all based on TH12.3, Hisoutensoku.
The first seems to represent the giant shadow or figure, the second the robot, and the last the catfish. I guess you could say each one represents what each of the characters were looking for in story mode.
Well,I just winged it on the last one. The giant catfish called himself Oo-namazu-sama,So..yeah. If anyone knows the real name,feel free to edit it correctly.