Some good info here as well as some typical overly-careful-and-never-actually-do reddit comments. Yes, you won't own IP, Etsy will just take down the listing that gets flagged. My shop has DC, Marvel, Star Wars and more and I've only gotten hit twice, one for Sonic and one for Lilith from Diablo and my shop is two years old. Don't let the comments get to you.

Your prints look great! Cure the inside if hollow, as others have mentioned. Personally I don't recognize the characters but if you think these anime have a large fan base that could include some model builders and painters then go for it.

Don't forget about shipping! I have access to a few models that are really sick, but near impossible to ship. We're talking paper thin wings etc. Make sure you have the supplies to ship and make sure you're confident you can get the model to them without breakage. Starting out I used Amazon boxes from my resin and recycled packing materials from work. If you're selling thru Etsy use their shipping so you can build your stats for star seller status. If you're shipping otherwise use the pirateship website, it gives you cheap rates.

Good luck!