While the other characters may appear to be grim during combat, this character's emotions will be more readily apparent. He will also be a source of very subtle comic relief. The reading of the lines will need to come across with a slight superiority of technical knowledge, but without any hint of snobbery. That is, he's very knowledgeable and doesn't hide his knowledge, but he's not trying to show off.

Update March 29th, 2017: This character is more lighthearted than his counterparts but also slightly panicky when under pressure. The first audition line shouldn't be read too seriously. The cadence should be more along the lines of someone explaining a technical trick to a bunch of non-technical friends. He thinks he's downplaying the difficulty of the technical problem he just solved, but it just serves to make him sound incredibly intelligent.

Most of all of the auditions seem to be getting the right tenor of the 3rd audition line.