's Kuroichi siblings, Kurai and Masaru.
Based on a true story (AKA real life)
"Kurai is the one who started Alex's adventures in Auosh, when the shadowy girl told "Uncle" of the university that's founded for the "above normal" students.
Since Alex's lacks the proper knowledge towards magic and his alchemy is very amateurish (can't say the same for his "splicing" abilities, though...), Uncle decided to invite Alex to the academy.
Knowing that the school can help him with his mission to find his father and to finish the "Great Old Ones" once and for all!... if he passes XD"
Here, Alex's "Dog" wandered off while he's in class, meeting the two in their break.
Masaru Kuroichi (and his Hell Teddy) & Kurai Kuroichi (sitting on her own shadow) (c)