Petelgeuse Romanée-Conti

Petelgeuse is the Sin Archbishop of Sloth. He has short green hair that is cut neatly along with black emotionless eyes. He wears a black, green, and red robe along with clerical attire.

[Spoiler] A hundred years ago, his appearance was mostly the same, except that he had tough yet gentle look. He had a sinewy and tall body, and also wore a black clerical robe. [/Spoiler]

(Source: Re:Zero Wiki)