Charles “Rollo” Tookus is Timmy's best friend. Timmy considers him to be boring and stupid. He often gets angry and in frustration. One such case is in the third volume, Timmy Failure: We Meet Again, when he got a B+ on his nature report (due to his partner Nunzio) he pounded on the floor and screamed that his GPA dropped.
He has a tendency to get freaked out about things that Timmy thinks are his issues only. In Timmy Failure: Sanitized for Your Protection, Rollo Tookus freaked out due to the fact that Timmy ran away in Chicago. However, he did try and help Timmy by giving him and Molly Moskins information on Corrina Corrina and informing him that he was being tracked via the debit card during their Chicago search.