
She has long blue hair & green eyes. She wears boyish outfits, but also wears short skirts
Alastor & Zero's sister
Lazy & rude, but maintains lady-like dignity. She loves animals, but she hates creatures like demons (but she loves Zero, though he's a demon himself)
She carries a long spear & small axe with her at all times. She is very cautious, so she takes the best measures & brings them
Isolde is very clingy to her brothers. If one leaves, she follows that one if the other stays or goes. She was upset when Zero joined the family, due to his demonic lineage, but she grew to love him in due time. She had left the castle alongside Alastor for unknown reasons & no one has heard from her since