source? Any idea who this character is?

https://cdn1-images.nutaku.com/images/landing/project-qt/6/1.jpg
https://cdn1-images.nutaku.com/images/landing/project-qt/6/2.jpg
https://cdn1-images.nutaku.com/images/landing/project-qt/6/4.jpg
https://cdn1-images.nutaku.com/images/landing/project-qt/6/3.jpg