On the one hand, it makes me uncomfortable and it seems like it makes you uncomfortable. I'm sorry about that.
On the other: it's SFW, it's an advertisement (that is, legal), it's a preexisting character (it's not like they're saying "hey, draw this person as porn"), it's spoilered, and it doesn't seem to break any global rules (insofar as it's still here).
You mentioned Reddit and Twitter. You seem to think they're okay with this sort of thing. I assume you spend most of your time on imageboards, and so aren't actually all that informed on what either site is actually like, but they very much
are not. Reddit bans loli and Twitter users do things like trying to call Elon Musk a child abuser for dating a woman who wears floral-print dresses. They are, in short, as vocally opposed to these kinds of things as it is possible to be, and spend most of their time contriving new ways to outdo each other in their opposition.
Therein lies the problem. Both Reddit and Twitter (but especially the latter-- Reddit is too dumb to be really toxic) are extraordinarily toxic places. Both have harmed people I care about. Both, but especially the latter, are aggressive and expansionist in their ethos. If you don't want expansionists to expand into your community, a wise thing to do is to have a conspicuous display of defiance toward their values erected in the town square. If you would prefer to avoid kneeling before the church, just have a feast of Odin every few months, and so forth.
I have to ask myself, "faggot, if you report this post to the owner, and it gets deleted, isn't it true that, in some small way, you've moved the tone of the board and site Twitterward? are you sure you want to drag the Overton window in that direction?"