- E-Units are categorized into 4 parts: Cores, Energy Kits, Memory Chips, and Skill Data Cards.
- Characters can equip one E-Unit part for each category.
- E-Units have 4 grades: Common, Uncommon, Rare, and Epic.
- Higher-grade cards are more difficult to obtain but grant increased effects when equipped.
- E-Units are composed of one main option, 2 to 4 sub options, and set effects.
- The main option and set effects of E-Units are randomly determined upon acquisition, while the sub options are randomly determined and unlocked when the E-Unit reaches specific levels.