Um. No?

Lottie falsely accused Colm because he accidentally set a tree at her house on fire. After the boys proved that he wasn’t responsible for the barn fires, suspicion reverted to the troll (who I’ve always thought was more of an ogre). Colm, trying to prove that the troll was the firebug, got caught, along with the troll and his fox, in one of the fires that Claire started. The troll went back in to save his fox, Colm went back in to save the troll, but then the troll saved both him and the fox. Claire then falsely accused some unspecified hoodlums from Wendlefield, and the troll, having proven his hatred of fire, joined Chief Little’s department. Colm then figured out that Claire was the firebug, but forgave her because she’s so cute, and kept the secret until “Missing Piece”, where I think him letting that bit of information out got lost in all the other drama. Sonny also figured out that Claire was the firebug, but he had no proof, and no one else believed him.

Ryan was only tangentially involved, and neither Groucho, Harpo, Chico, Zeppo, nor Karl were involved at all.