Kieru (Japanese キエル) is the eldest daughter of a research group within Mezeporta Square.
She is a person that feels indebted to all who help or service her.
Being the oldest of all her siblings, Kieru is now the chief of the caravan that her family has left behind for her. She keeps track of all activities that go on in the caravan and leads them on to be successful in the world. Kieru helps out hunters when she can, including when hunting down Laviente.
Kieru wears her hair in a pony tail, carries a staff that resembles a hot air balloon, and wears clothing that resembles the caravan that she is in control of.