S.A True Arena again [Round 15]

Instructions

I bet these spoiler preventions are getting annoying at this point don't worry only 1 more to go Rose - A Time Traveler who only summons itself by Star Portals... but yet, it was summoned by a Phantom Portal by Veronica. Did it choose to be summoned? It didn't seem hostile at first either... is there something else in there? Waiting for something to free it? Dark Matter - A race of beings who spread chaos and darkness where ever they go. Rose must have suffered so much while under it's control. Maybe after you beat Dark Matter, you can help Rose when you see them again. Maybe...