Taken from TOTO unit (MK-III) user guide:

The TOTO unit’s mechanical body is constructed of delumium alloy, a durable metal capable of withstanding sufficient impact in the line of duty. It is the owner’s responsibility to familiarize oneself with the limitations of delumium alloy. Falls from a substantial height, damage to the cranial center, and blunt force trauma to the power core may cause irreparable harm to the unit. Do not submerge your TOTO in water.

Danger Zone One. Story by Midnight. Art by Sikretwepon.