>>539816906
Heart-shaped halo combined with the succubus tail would probably make Ibuki's design too sexual and doom her to never get a single SFW artwork ever again. Heart-shaped tail is a lot more subtle and easily overlooked by most people.

>>539817187
The tail dude, read the discussion. She's not a sexual succubus as in "haha she'll suck you dry she's obsessed with sex!!!" but her demon race is just succubus for some reason.