Yes, HiMERU's name is HiMERU. He is from COSMIC PRODUCTIONS'- or rather, COSPRO's idol unit "Crazy: B" alongside Amagi Rinne, Shiina Niki and Oukawa Kohaku.

...HiMERU's use of 3rd person? It isn't as far as depersonalisation, but rather that HiMERU feels quite distanced from his "true self". Please disregard this if possible, HiMERU would much rather focus on working hard to be a traditional, orthodox, hard-working idol.

HiMERU continues on after the obligatory self-introduction, gifting a soft smile for the sake of professionalism.

Ah. HiMERU sees you now. ...Did you need something?