in "utawarerumono: mask of truth", it is revealed that while he did manage to return, he is confined to the boundaries of the great seal under the onkamiyamukai in the midst of the ruins of the onvidaikayan, where a shrine is built, and erurū lives there as the shrine's caretaker. as a part of uitsalnemetea, he continues to be connected to the origin, which allows him to perceive most things, and he is aware of everything that goes on in the outside world. when kuon is taken over by uitsalnemetea after haku dies from overusing his mask, hakuowlo passes his mask and powers to haku, allowing him to save kuon. this has the side effect of returning hakuowlo completely to a normal human, and in the final scene he leaves the shrine with erurū.