[DecoyBlackMage]

I think they are skipping the opening until Valkyrie gets her introduction, perhaps, or because they simply do not want to spoiler something just yet.

The more likely reason though, they wanted the screentime and skippeed the opening due to it.

edit: The first two episodes have been utterly amazing for me so far, I have rewatched the first episode multiple times already, and I feel like I will do the same with the second.
The cringe humor attempts from Aruto has been pretty ehhh for me, but worldplay is not exactly the easiest to translate over languages, so yeah most of us would not really
get it, and even if we did the pun types are clearly intended to be cringe for anyone that hears them.

Except for Fuwa, and that gag actually had me in stitches at the end, well played Zero One, well played.

More importantly, I actually really like Aruto as a character so far, and it is clear there are going to be a ton of miserable fights
he has to do in the future taking in mind what he had to do in this episode, he clearly sees the HumaGear as people, or at least
as beings that deserve to be treated like they are more then just tools, like the majority of other characters sees them as so far.