Giroro

He is the Platoon's weapons specialist, and as such is obsessed with various weapons of war. He also has a slight attraction on one of the human characters, Natsumi Hinata, due to her being "pure evil". He is not changed much from the original version... at first...

History of Characterization
In Episode 0, Giroro wasn't really changed much from his original incarnation, though he was slightly more scatterbrained than usual. Later, during editing for one of the scripts, RabidSonicFan gave a joke of a line that essentially created an entirely new character. Instead of being a gruff soldier, ready-for-duty, he gained a child-like demeanor and was somewhat whiny (not to mention that his I.Q. dropped significantly). He also lost much respect from the Klan and is usually the butt of jokes and/or the scapegoat for whenever something goes wrong, which [more often than not] usually makes him go into a hissyfit

Relationships
Keroro - Having been friends with Keroro all of his life, he has the biggest relationship with him, out of any of the other characters. Due to gaining his child-like personality, he takes up Tamama's role of intensely admiring Keroro (even to the degree of having an ambiguous attraction to him). Despite this, Keroro seems to not particularly care about Giroro and criticizes him numerous times throughout. Also unlike the actual show, Giroro and Keroro's roles are a bit swapped; in that Giroro could care less about invading Earth, while Keroro, on the other hand, is much more focused on his job, due greatly to his boost in intelligence.