| Name | Purpose in human X/X-human world |
| Hunter X | They seek and kill people. They are human with offense weaponry fused with their bodies |
| Tracker X | They locate enemies for Soldier X, Hunter X .Fusing their bodies with hi-tech tracking device. And have minimum weapon support |
| Soldier X | They work closely with Lord X or Master X to deal with enemies. Their body is fused with weaponry fused by Hunter X and tracking devices that were fused with Tracker X |
| Creature X | Created by an unknown source. It purpose is to destroy Master X and Lord X. Immune to most weaponry used by the Human X |
| Pilot X | Their body are fused with aerial vehicles.The transport soldier X. |
| Deep Diver X | Like their name suggested. They are naval unit, their body fused with the sea vehicles |
| X Locater | They serve the same as Tracker but don't have weapon support. In turn they have faster movement than all Human X except three Human X ,namely Lord X, Master X and Creature X |
| Normal X | refers the non battle Human X |
| Commandeer X | They are Soldier X with exceptional good leadership qualities |