Hell Inhabitants:

Charlie Morningstar- Yuu

Vaggie- Jack Howl

Angel Dust- Epel Felmier

Alastor the "Radio Demon"- Azul Ashengrotto

Sir Pentious- Riddle Roseheart

Husk- Leona Kingscholar

Niffty- Floyd Leech

Katie Killjoy- Divus Crewel

Tom Trench- Ashton Vargas

Cherri Boom- Sebek Zigvolt

Vox- Idia Shroud

Valentino- Vil Schoenheit

Velvette- Cater Diamond

Zestial- Maleficia Draconia

Carmilla Carmine- Lilia Vanrouge

Odette Carmine- Silver

Clara Carmine- Malleus Draconia

Rosie- Sam

Lucifer Morningstar- Dire Crowley

Mimzy- Kalim Al-Asim

KeeKee- Grim

Razzle and Dazzle- Ace Trappola and Deuce Spade

Heaven Inhabitants:

Sera- Ambrose LXIII

Emily- Neige Leblanche

Saint Peter- Che'nya

Adam- Rollo Flamme

Lute- Rollo's Vice-President (Sorrel)

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(A/N: I tried to match them up due to them either having similar personalities or situations they had been or currently are in. But just remember this their reaction to a different version of themselves that they're not actually like this. If you don't like this, then don't read this at all.)