Meet ENlil a.k.a Writer-ENA. Their face-changing process is kinda... weird and it lowkey reminds of flower blooming. His aim is to write perfect thriller/detective.
More info under cut, but I'm free for your questions
They have two faces: pedantic(dark-blue) and psychotic(orange)
Pedantic one is perfectionist, serious and concentrated, in this personality they write an actual story. Psychotic is unhinged, emotional and it's easy for them to unalive someone, but he doesn't do that. This personality is good in writing emotional stuff and murderers/psychos/crime scene descriptions.