Hahaha, you're right, but to be fair, the other pawns don't have that red feather on the helmet, which leads me to believe it's really a knight like the white one. So the bishop should be a safe move XD
Menyssan is actually one of the most intelligent succubi in hell of Karbo's world. I've read quite a bit of his work and it's pretty amazing. In this she's playing herself. I think there's another picture on this site where she is playing shougi against Shikamaru from the Naruto anime