Let’s be honest here
Giroro can be, and is, very brutal. No matter how ridiculous he acts sometimes, he is still a soldier.
I mean, think about it.
In episode 50, when Natsumi got sick, Giroro left to go and find a Space Cerberus’s liver. When he finds out they are out of stock, but the owner of the store says they have a living Space Cerberus in the basement, he goes and decides to face it.
In other words,
He slayed a Space Cerberus and tore out its liver in order to heal Natsumi.
THE THINGS HE DOES FOR LOVE.