Calem is tall, quiet, and mature for a 13 year old merman. He has straight, chin length black hair. He has a tail lined with mosaic dark blue colored scales and fin instead of legs. He wears a Mega Ring on his left wrist, and has a Milotic named Flow. Due to his Mega Ring, Team Flare has sent grunts to the sea to catch him in a net to get the Mega Ring, but Flow saves him. He looks for romance. If caught in a net, he's helpless since he's thin. If he wanted to, he could turn anyone into merfolk.