>>60974144And look what I found on the link.
https://twoucan.com/profile/kawazoi_groupArumaki is credited as the proofreader, not translator for 2 of the comic strips. Last I know Coco, Miko and Shion are in hololive not nijisanji. If it is the same Arumaki that posted that Aloe YT commetn, I think he probably didn't lie saying that he himself is a holofan.
Also by the way, if you search using JP あるまき にじさんじ you will just get result for Hana Macchia. There is basically no relation between Arumaki and Nijisanji that I found except for that singular redditor who claimed he is the fan of nijisanji, probably because he cannot read the Japanese word for "hololive".