I don't think that's Ib.

I think it's tagged as such on Pixiv. I don't really get it either though.

I don't think that's Ib. Could be somebody else.

Can't see how the character is Ib, but I think those are the Paint Balls From Garry's segment of the game

The artist says it's "evil Ib-chan" (悪イヴちゃん).

She is "Dark Ib", a character from Marimo's Precure x Ib crossover webcomics, ”Garycure (ギャリキュア)”. See also Marimo's Garycure series on pixiv.

She played an active role in the episode #7. (pixiv #33536935)

So Ib + dark_persona?