Excuse me, about this tweet by Subaru-san...

This... "ajimaru"...

is this a typing mistake for "Hajimaru"?

No, that's wrong. That's just Subaru-san's version of it!

She just says "ajimaru" instead of "hajimaru"!

Yeah...you would think that "ajimaru ajimaru" is a typing mistake huh...

It's really just "hajimaru"...it's normal to think "What is she even saying"...