"Trigger"'s Links
Trigger has mixed feelings towards Miruku. While he is the only individual that Trigger trusts, there is a sense of fear that Trigger just can't shake while in his presence. While Miruku comes off gentle, caring and delicate towards him, Trigger feels there is something that the other Oto-chro is hiding from him. Regardless, Trigger views Miruku as an overprotective older brother. Especially considering Miruku handles most, if not all, of his maintenance...
Trigger is viewed as Miruku's pet project and he is very fond of his treasured tool. He seeks to be the lone influence on Trigger's personality and thus keeps the other Oto-chro very sheltered. While ultimately his goals are nefarious, he treats Trigger as a little brother and enjoys doing activities with him such as going to parks, playing games and watching the latest holodramas (television shows). There is an underlying obsession in Miruku's feelings for Trigger which usually becomes apparent during Trigger's routine maintenance.
Trigger idolizes XI, but also has a slight rivalry with him. He was drawn in by the bad boy image that XI had. Eventually Trigger's interest in the idol sensation led him to find out about Nanashi's secret side job of arbiter work and while he kept his lips sealed about it, his fascination was only further piqued with the other Oto-chro. Their jobs were somewhat similar in a way: Nanashi, an arbiter on the side of justice and bringing order to the galaxy, and Trigger, the bounty hunter bringing in high price bounties of those on the wrong side of the law. To him, XI was more than just a musician. He was a rival and hero.
Nanashi doesn't know Trigger personally, but he would probably think of Trigger as a loyal fan and would probably treasure a friendship between them. However, regarding the more serious nature of their jobs Nanashi might not like Trigger's happy-go-lucky and carefree approach to the situation. He would probably feel concern for the other's well being more than anything since Nanashi (while opposed to being an arbiter overall) feels that his work is to protect people. Especially his fans.