i'm like 99% sure that tanaka is kurebayashi's son... she said he was altered by his father and got scars that never healed and look at tanaka now. he's clearly 'mixed'. also he's about the right age to be her son and his hair is black too, you can see his roots growing out from the cheap dye on his hair. kurebayashi also knows about the company and clearly dislikes them, maybe because of how they recruited her son into their shady business.
using his mother's period stain cleaner for the blood?? LMSOOOOOO
