Relationship between Scanlan and Tiberius

Scanlan thinks Tiberius is a bore, often interrupting him when he is trying to explain something. Tiberius abuses Scanlan with magic when he doesn't want to be interrupted.

When Tiberius explains what the intellect devourer did to Grog, Scanlan sarcastically thanks Tiberius for his explanation. When Tiberius butted in on a conversation Scanlan was having with Pike, he interrupts him and ends the conversation quickly.

During Tiberius' explanation of his magic water bottle, he squirts Scanlan in the face. And at another time he Silences Scanlan.

Though their relationship isn't entirely antagonistic, as Tiberius is willing to give Scanlan magic items that he thinks will be useful to him, like the Wand of Magic Missiles, and the Ioun Stone.