Another Ouju that is in Erin's care in Kazalm, but a male. Eku was originally a wild Ouju, but was injured from a Silent Whistle. Eku, being from the wild, had no trust towards humans, however, after spending a night at his shed, Erin becomes the only human he trusts. He lives in Kazalm to stay by Lilan's side. Esal reveals that his name derives from ancient language.

(Source: Wikipedia)

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