Tagged AI-assisted because this is a colorized version of post #9353018. It might need to be changed to AI-generated if another artist colorizing the image isn't enough.

Blank_User said:

Tagged AI-assisted because this is a colorized version of post #9353018. It might need to be changed to AI-generated if another artist colorizing the image isn't enough.

The pixiv link has the traced line art, so it's not directly colorized. The eyes, for example, are also fixed compared to the "original", so AI-assisted is probably fine.