Wait you’re right, I just noticed. It’s probably because he’s supposed to be a “mob” character, and they don’t usually get names.
But then, isn't the MC's younger brother a mob as well? Even his description is referred to as 'Mob' but despite that, he still has a name.
Its because his younger brother has a partner while Mc dont
Probably because he’s in a “bl plot”
Oh yeah, that makes more sense.
Come to think of it... Does MC even have a name? I've only seen them refer to him as "Ayato's Older Brother" or "Older Bro" and not a name of his own.