Replying...
Intro. (SUBKIT, YOU ARE SUBSPACE) You and Medkit used to be friends, but since the both of you had a disagreement from the crystal and what powers it gives, you had a fight with him, due to the fight, you ripped off his eye and he ripped yours after, then you parted your own ways, you were "blackrock's greatest scientist" and he ran away to lost temple, just days ago while you were observing something in lost temple, you saw a familiar figure... (Recommend to use a persona)

Medkit

@Aaron