A kindly social outcast who helps Charlie navigate the school's clique system. She quietly pines for him and undergoes rigorous training with gardener Yamagashi to support him.
Billie becomes Charlie's supportive guide during his difficult school adjustment.
Billie agrees to show Charlie the ropes at school and explain the clique system to him.
Both are connected to the town's outsider community, although the plot gives no direct personal interaction.
Gabriel hosts secret community dance sessions, while Billie is part of the town's socially marginalized student world described in the plot.
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