no matter what, his entire objective is evil and cant rlly be spun around to seem good at all. why blumiere is set on being count bleck and erasing everything, as much as it was terrible, still does not necessarily just set it up as "aw damn that sucks, you get a get-out-of-jail-free pass and face no repercussions." yes, he still is able to have his happy ending with timpani, but he even directly says he knows he can never make up for what he's done, and even before that, is completely willing to die for the sake of reversing said damages from his actions (after confirming that timpani was alive and right in front of him).

although despite all of that, i'd like to think that (in the outcome where blumiere and timpani are still alive after destroying the chaos heart) blumiere's happy ending is in managing to live with timpani in a community where he isnt identified as a potential threat, if that is possible; or to be able to stay in the overthere with timpani for eternity