Who is the Japanese voice actor for Allen?

The Japanese voice actor for Allen is Aina Suzuki.

What role does Allen have in that anime?

In Isekai Yururi Kikou: Kosodate shinagara Boukensha shimasu, Allen is listed as a main character.

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Allen appears in Isekai Yururi Kikou: Kosodate shinagara Boukensha shimasu.

Allen is the older twin brother of Elena, and currently adventuring with adoptive older brother Takumi.

Spoiler Warning: Click to View

Allen is the son of the Water God Windell.

Isekai Yururi Kikou: Kosodate shinagara Boukensha shimasu

Isekai Yururi Kikou: Kosodate shinagara Boukensha shimasu

Isekai Yururi Kikou: Kosodate shinagara Boukensha shimasu

Aina Suzuki

Japanese

Lara Woodhull

English

Otávio Moura

Portuguese (BR)

Lucía Suárez

Spanish