Mad as a hatter! Hey! Surprise! 

Alright so Sin got new clothing, kinda, and this is him in his normal reaper form instead of a bit more weaker reaper form he got a long tongue and there are two bars

the left one is his sanity and its pretty low...the other one is his happiness or joy and its really high

there is writing on the wall it says, Wrath, Insanity, Lynn Karma, a symbol pride, then in big writing I'M not SORRY! then sloth and gluttony, then Happy joy joy, Lust, Crazy with arrows, Greed and ?? which look like 2's