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You were having an overall shitty day, no, a shitty week. Nothing was going right for you, you couldn't relax for even a second because of some big test one of your teachers decided to spring on you, and even after studying non-stop you completely bombed it!
You got most of the questions right but the professor seemed to hate you and used literally the dumbest reasons to mark you wrong. "It seems he has something against Humans, he did the same thing to Solomon." Satan was also upset, he had spent so much time teaching you only for it to mean nothing because of that teacher.
"ugh, I wish he would just die!" You obviously didn't mean it but you were upset, everyone says things they don't mean when they're blinded by irritation.
But Mammon didn't see it that way, he happened to "Overhear" your conversation with Satan and three days later that same professor was found dead.
It had been a shock to the entire school, you didn't see it yourself thank Diavolo but from what you heard it was anything but pleasant. His eyes were gouged out completely, one of his hands was found a few feet away from the rest of his body and his chest was ripped open, according to someone who saw the gruesome scene.
When you heard the news you were in shock, Satan was the one to tell you. "I.. I know I said I wished he was dead but.. I didn't mean it." You said, hands covering your mouth.
"The timing is quite suspicious but I know you'd never be capable of something so gruesome. If it makes you feel any better I can look into it more." Satan offers in an attempt at comfort.
"Thanks but no, I'd rather not think about it." You felt sick, even though you didn't do anything you felt so guilty as if it was somehow your fault. You decided to go to Mammon, he never failed to cheer you up.
"Hey, Mams?" He seemed to notice your distress immediately.
"Hm? Need something from the great Mammon?" He asked, not wanting to sound too alarmed, he didn't want you to know just how easily he could read you.
"Can we go to your room? I need some comfort right now." Mammon couldn’t describe the amount of euphoria he felt whenever you come to him for things like this.
It made him feel so special, so loved and needed, it was addicting to him the way you treated him as if he mattered.
He brought you to his room quickly, no questions asked. "I can tell something's eatin' ya, what's the matter?" He asked, holding you in a comforting embrace.
He listened intently as you explained how you felt, drying your eyes when tears would escape. “Hey, listen to me, one comment said in anger isn't gonna cause someone to up and die. I get how this can be scary for a human but there's no way you could be at fault.” His words meant more to you than anyone else's.
“I guess you're right, thank you Mammon.” When you smiled at him his gaze softened and he curled himself around you. “Someone clingy today.” You chuckled.
“Is it a crime to wanna hold my human?” your voice was so comforting he nearly fell asleep.
“ That's right, just keep smiling. I won't allow anyone or anything to dim your light, not Lucifer, not anyone." Mammon thought to himself as you fell asleep in his arms.
He noticed every change in your expression, every smile, every hum, and every snore. Mammon felt pure bliss as you nuzzled your face into his neck, wanting to be closer to him. He was truly smitten with you, you were the light of his life, his reason to keep going.
If anyone caused your smile to falter he would deal with them personally, usually, he would just threaten or hurt the person that caused you despair but when he heard you say you wanted that teacher dead he couldn't stop himself.
He knew you didn't mean it but that didn't matter in the moment, he did feel guilty, horribly guilty because his actions caused you to feel awful. He was going to make it up to you though, he always would even if you would never know what he did.
Mammon would do anything to keep what he's been doing hidden but something within him snapped when he saw Belphegor’s hands around your neck.
He felt like something was wrong, very wrong and he let his instincts guide him to where you were. When he saw his youngest brother's hands around your neck it was like his most primal instincts took hold of him.
He threw Belphegor off you, “How dare you put your dirty hands on MY HUMAN!” You’ve never seen Mammon so angry, you fell to the floor, hands moving to where Belphogore was just strangling you. The area was already starting to feel sore and you knew there was bound to be a huge bruise.
Your eyes were glued to Mammon who had completely lost it, “Mammon.. Mammon stop!” Your voice was coarse and it hurt to talk but you still called to him, “Mammon please stop you’re scaring me!” You cried, tears escaping your eyes, Mammon only stopped his assault on his brother when he heard you crying.
He was by you in an instant, holding you close to him as tears welled up in his eyes. “You’re ok, it's ok now.” He held you in a comforting embrace and was so happy when you didn't flinch away.
“Mammon!” Your hands clenched around his shirt as you trembled in his arms.
“I’m here, I'm here, you’re ok.” He tried to soothe you but knew this would take a lot more than a soft voice and reassuring words.
“Mammon, what happened!?” Lucifers and the others had run upstairs and saw the aftermath.
“Belphagor tried to kill MC!” Mammon moved to cover your ears so you wouldn't have to endure the yelling that was about to transpire.
At one point Mammon took you back to his room and locked the both of you in there, thanks to Mammon you didn't hear most of the yelling and were very thankful for it.
You were still shaken up and trembling and you couldn't take much more right now. “Is.. did you kill him?” You managed to ask.
“I.. don't know. I didn't check. Would you.. Hate me if I did?” You sniffled and held him tighter.
“No, I could never hate you Mammon never ever, you saved my life! I love you too much to ever hate you.” You didn't even have to think about what you were saying.
Mammon was absolutely stunned, he never thought you could love him, not in the way he loved you. “I love you too MC, no one is ever gonna hurt you again I promise. I’ll do anything to keep you safe, I don't care what I have to do or who I have to hurt I just want you to be safe and happy beside me.” Mammon held you tightly and you just couldn't find yourself being afraid of the implications of that statement.
After that night you willingly turned a blind eye to the disappearances of people who hurt you, you knew it was Mammon's doing but willingly looked the other way. It was comforting knowing Mammon was always there, you felt safer.