|“||I knew I should've stayed home today!||”|
Arnold M. Perlstein is very cowardly and is always hoping for a normal field trip. He is very cautious and slightly superstitious but very intelligent. He has car sickness and slightly dislikes field trips as they may bring him out of his safe zone just to learn things. He has claustrophobia like the Seeker and enjoys the company of Liz, Wanda, and Valerie. He is always prejudicing Fiona's field trips, but sometimes he enjoys them.
Arnold now has straight red hair, and he has green eyes. He wears square glasses, a light yellow shirt, a green sweater, blue jeans and brown work boots.
- In "Goes Cellular", Arnold's eyes were shown to be brown, but in this sequel, they're green