Mamoru is a onu-matoran who lost his memory and thinks he is a le-matoran after he spent too much time in a matoran sphere. He worked as a miner on metru nui before losing his memory and began to follow faith, the le-matorans' favorite stat and even though he was slower than le-matoran when it came to vineswinging or tree climbing, he was faster on flat land than the le-matoran. His name was originally Mamru but when he lost his memory, he called himself Mamoru.

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