Arnold the Super-Ish Hero

Though Arnold works in the family superhero business, he isn't exactly a superhero. Unlike all his relatives, Arnold has no superpower. Everyone expects it will show up any day. Arnold believes that the only thing he's good at is taking phone messages. Then, one day, a call from a girl in distress comes in to superhero headquarters, and no one else is around. Arnold has to respond to the call. Determined to succeed, Arnold helps all kinds of people along the way. And that's before he even finds the caller! He does so many good deeds, in fact, he's identified as a masked man helping the good guys. Wait, could being nice be a superpower?