Ylmyar's Links
Ylmyar was the second person to join Dio's crew. They're sometimes put off by Dio's sexual forwardness, but his good natured sprit always keeps Ylm rather comfortable and eager to talk to him and hang out.
Dio met the nudibranch on Terra Zenso, and not long afterwards they joined his posse. It's not difficult to see that Dio is rather fascinated by Ylmyar on a number of levels, and has a slight fixation on him at the moment.
Ylmyar loves Freyja and is very fond of her. He likes spending time with the feline woman and they bond over next to nothing very often. They also work together, so it's even more time they spend together just shooting the shit.
It wouldn't be inaccurate to say that they're as thick as thieves. They hang around each other a lot, and they often comment on how their natural colors "match". Usually linked arm in arm or holding hands, they're beyond affectionate.