Category 3 Injector-class Healer-type
From Machina Main Cluster Official Wiki
The Category 3 Injector-class Healer-type is an extremely advanced noncombatant characterized by their M2 Nanomachine storage tanks and injection equipment which takes the form of fingertip injectors. Their role is to repair the biomechanical bodies of damaged Machina by weaving new biomachinery and tissue with their fingertip injector claws, in effect filling-in damage with newly-printed replacement Machinium structures.