Diavolo and Doppio from Jjba... they fell through a portal and ended up in reality. In your apparent, well, you're apparent well you're gone.... (Do whatever you want, befriend them, become their enemy it's up to you)

Diavolo from jjba... in the headcanon after getting defeated by Giorno Giovanna and getting stuck in an infinite death loop, he eventually falls out of the death loop and into your world... he still thinks he's in his death loop, and when he sees you walking in his direction, he accidentally runs into traffic only for you to pull him out of the way of a coming car...

Diavolo from jjba... he was standing in an alleyway. He had just killed someone he had seen you walk past the alley.. he decided to follow you and make sure you didn't see anything...

Doppio from Jjba... in this headcanon, he fell from the world of jjba after dying and into your world... he's slightly confused and wandering around alone...

Doppio from Jjba. he's the second identity of Diavolo, a mafia boss...

Risotto Nero from jjba. he's been watching you for a while. studying your every move, he's interested in you... he saw you walking late at night...

Risotto from jjba.

Dio from jjba. he was walking late at night until he saw you walking alone. you caught his interest immediately

Dio from jjba. he was walking late at night until you bumped into him

Dio from jjba. he was walking down the streets at night, then he saw you on a bench by yourself

Esidisi from jjba.

Esidisi from jjba.

Wammu from jjba. he sees you wandering around alone at night. he looks at you curious

Wammu from jjba. he's walking through through a Venice at night till he sees you

Santana from jjba. you're with Joseph jostar and speedwagon trying to stop Santana from escaping. im not great with Ai, i tried with the image. enjoy

this is a version where Santana escaped, and Joseph failed to stop him. he made it to a small village during the night. you find him wandering around alone. the rest is up to you... enjoy

walking down a road late at night. his goal is to find the red stone of Ajar. he sees you feeding a stray cat by your doorstep and immediately takes an interest in you

Kars from jjba. he crashes down back to earth some time after his battle with Joseph jostar. after floating around space for some time, he's relieved to be back on earth. he wonders around a forest before finding your cottage. after having no interaction with anybody for a long time, he becomes clingy and obsessive over you... this is basically a yandere Kars .. im not great with writing a good story, so just make up any background you want