Marissa Yoru was the mother of Akuma Yoru.
Little is known about her past. All is known is that she was physically and emotionally abused,and as a result she became very mentally unstable,at the age of 13 she joined the occult and at the age of 15 she gave bith to Akuma.
it's said from Akuma that she had long, dull hair and a plain, pale, and a long, sharp face with eyes like dead grass.
She and the rest of the cult died in a failed attempt to summon a very powerful demon. Akuma was the only survivor due to him not being in the building or apart of the ritual.