Iris

This mysterious young girl was found by Enzan during an inspection of an abandoned military base located in Ameroupe. After their short encounter, Iris fled and disappeared for a time. She resurfaced surprisingly at Netto's school, with her attention solely focused on Rockman and his relationship to Trill.

Iris comes and goes as she pleases, often appearing in the oddest of places without the slightest explanation. It becomes confirmed that she originates from the mysterious parallel world known as Beyondard, and she holds a special connection with Trill. Just what exactly her purpose is, however, remains a mystery.

Nonetheless, Iris is beautiful and soft-spoken girl, who wishes for nothing more than Trill's safety and protection from the evil Zoanoroids. She does have a navi of her own, who does not seem to have a name at this time.

Iris has a lot of secrets about her, which you won't learn until much, much later.
This character description was made for episodes that I have seen so far. It may be updated as more episodes become available.