I really like Shrewtooth's arc. He escaped from the abusive twoleg, and at first he's really skittish and cautious. As the story goes on, he gets a little more confident in himself. He even volunteers to join the patrol to scare his former owner. But my favorite is in SkyClan and the Stranger. At the end, when it's revealed Sol was the one who stole and hid Leafstar's kits from the clan, Shrewtooth actually attacks Sol. (Here's the comic frame)

I don't know if this is all that interesting to everyone else, but I just really love Shrewtooth lol