Seu

A Planter, who serves as Mensab's protector. He is a powerful swordsman and loyal bodyguard. Whenever he is severely injured, Mensab takes him to be restored by equipment which can heal any damage and also synthesize any substance (however, he loses memory each time he is healed in this way). As only Mensab's people survived the silicon creature invasion, and they were likely killed in the destruction of Toha Heavy Industries, Seu could have possibly been the last Planter alive. He eventually withdraws with Mensab and the recorded personalities of the remaining Planters into a time-space rift, ensuring their safety. However, the nature of this escape guarantees their entrapment in the rift, as technology has stalled throughout The City and Toha is destroyed. (Source: Wikipedia)