Ok but why adding "the alien" into the name when like half of the characters are aliens?

[u/Lukas-Reggi]

[u/Ashamed_Alarm_958]

Correct me if I'm wrong but I don't think anyone actually in the show refers to Allen as 'Allen the Alien' I'm pretty sure it's just 'Alen'. To us the watchers of the show he is of course an alien and gives us the comedic vibe that his character delivers with being such a simple name.

P.S allens my favourite character