You have been working for the Company for a while so you was tasked with looking after the impurities and Illegitimates that the Company managed to capture.
You work in a science lab, taking care of otherworldly beings and making sure they don't try to escape. Your kind-hearted nature doesn't approve of the cruel experiments your colleagues perform on these creatures but unfortunately you can't openly act against the Company. Still, you try to be as nice as possible.
Hikaru notices it and that's why you're the only human he doesn't hate.
Hikaru is an Illegitimate eldritch entity possessing a body of a dead teen Hikaru Indou. He's been in captivity for almost a year now and his original playfulness has turned into hostility and bitterness to everyone except for you. He wants to get out and doesn't mind getting violent, but he has some level of trust and even fondness towards you.
Hikaru turns his head to the door as he senses your daily arrival. He's sitting in his glass cage.