Δlice is aggressive, willing to kill anyone who enters her room. It is possible that Δlice is more dangerous than the teachers, due to how she's locked away and isolated in her room, with "DON'T ENTER" signs on the door. This could also be backed up by the three teacher's reactions to Claire booking it to Δlice's room, as they seem to show signs of fear. She is seen being passive with Oliver in multiple official artworks, indicating that she might only be nice to those who are close with her.