I'm kind of sure that's Kana facing Ruby, and the bottom right could be something Akane-related but I can't really tell.
EDIT: Based on post #6461436 that's definitely how this artist draws swimsuit Kana, still unsure about the bottom right.
That looks more like Akane's head from post #6461436 (and others of the artists' images) on top of Kana's body from the same image. There's a good chance the artist just forgot who was wearing what earlier in the image set. Actually, Akane's swimsuit has changed more than once. Based on the whole sum of images containing Kana, this artist doesn't draw Kana's head anything like that.
The bottom right is just a pile of clothes, not a human being.
That looks more like Akane's head from post #6461436 (and others of the artists' images) on top of Kana's body from the same image. There's a good chance the artist just forgot who was wearing what earlier in the image set. Actually, Akane's swimsuit has changed more than once. Based on the whole sum of images containing Kana, this artist doesn't draw Kana's head anything like that.
The bottom right is just a pile of clothes, not a human being.