He is a gold standard of how someone with both Sun and Moon Pieces would be. He is whimsical and quiet, very artistic but not too eager to advertise it, lives in his own head, takes photos of his friends to make them happy and loves plants. It's all too Pieces.
Pieces people have this wall around them and are too nervous to let the dark parts slip out.

I'd say he is a Mercury Libra because he is scared of confrontation and too addicted to keeping things the way they were. Thinkining harmony is ignoring the conflict and brushing them under the rug is such a libra trait.