Manta is an arrogant scientist who believes that his genius intellect places him above everyone else. He's a middle-aged man who lives with his mom, who continues to police what he is and isn't allowed to do. He's attached to his blaster, which resembles a toy.  Mad scientist voice with a somewhat juvenile, obnoxious delivery when upset.

Line 1: You may have defeated those primitive small fries in the filler classes, but you're nothing compared to me.

Line 2: You impudent brats. I'll show you what this weapon can do...there may be some assembly required, but the results speak for themselves!

Line 3: No...you damaged my precious blaster! I won't forget this, you brats. I will have my revenge!