Devil: Mugman would've been alright, if it wasn't for Cuphead... They constantly argue. Mugman would be a really great person, if he just let Cuphead go. Hell! Mugman wouldn't have lost his SOUL in the first place, if it wasn't for his brother's idiocracy! So, without Cuphead involved? I'd say that Mugman is pretty alright. 

*With Lucian and Sans*

Sans: What's going on?