This is a LoRA of Roll.EXE, the NetNavi of Mayl Sakurai from Rockman EXE (also known as MegaMan Battle Network).
As a kid, I was especially struck by the scenes in episodes 18 and 19 of the anime, where Roll becomes corrupted by an Evil Chip. That dark transformation left a strong impression on me.
Description
I rebuilt it using the Anima version, but since I specified only a few tags, the images seem a bit mixed up.