The following translated details come from Gematsu... - boy who lost his memory that the protagonist encounters on the
Vacant Island - other than his name, Malroth, he has lost all
of his memories since coming to the
Vacant Island - luckily, he hasn't lost the ability to
build - very good at fighting monsters and collecting materials - using the power he possesses, Malroth will play a big
role in battles and material collection - Malroth will aid the hero as a relaible ally - he will fight monsters with powerful attacks - also helps collecting materials using the power he possesses for
building - create weapons and equip them to Malroth - if you equip him with a powerful weapon, Malroth will play an even greater
role - when the protagonist starts collecting materials, Malroth will lend a hand - use the power
of two to cover more ground - while Malroth plays a big
role in material collection, he is not good at
building things himself