Bio: Mr. Slattery was a teacher at Angelica Jones' new school. Angelica (aka Firestar) was always on the move due to her father's job. Mr. Slattery, along with a few of the school bullies, is one of the reasons Angelica first manifested her mutant power of manipulating microwave energies. After he kind of embarrassed her in class, the bullies continued to pick on her at lunch after she tried to sit with them. Unbeknownst to her, Angelica started to heat up the carton of chocolate milk until it exploded, spraying Mr. Slattery in the face as he walked by.