Melanie Watson

Drummond arranges for Arnold to see two people who might ease the boy's concern about his size.

Arnold motivates a disabled girl to use crutches, while she encourages him to participate in the school play.

Kathy transfers to Arnold's school and is treated very poorly. When she becomes hall monitor, she doles out demerits to everyone except Arnold. Arnold tries to get Kathy to lighten up but instead is hard on Arnold too.

Arnold is in charge of keeping donations for a fundraising drive at school, but loses the money when he puts it in an old pair of shoes that gets thrown out - the family has to dig through the garbage to find them.