Primary

• Omega The original body of Zero
• Omega Servant of Dr. Weil
• Omega Enemy of Sage Harpuia
• Omega Enemy of Fighting Fefnir
• Omega Enemy of Fairy Leviathan

Extended

• Zero Friend of X
• Zero Teammate of Axl
• Zero Enemy of Sigma
• Sage Harpuia Servant of X
• Sage Harpuia Servant of Copy X
• Sage Harpuia Rival of Zero
• Sage Harpuia Teammate of Fighting Fefnir
• Sage Harpuia Teammate of Fairy Leviathan
• Sage Harpuia Teammate of Hidden Phantom
• Fairy Leviathan Servant of X
• Fairy Leviathan Servant of Copy X
• Fairy Leviathan Rival of Zero
• Fairy Leviathan Teammate of Sage Harpuia
• Fairy Leviathan Teammate of Fighting Fefnir
• Fairy Leviathan Teammate of Hidden Phantom
• Fighting Fefnir Servant of X
• Fighting Fefnir Servant of Copy X
• Fighting Fefnir Rival of Zero
• Fighting Fefnir Teammate of Sage Harpuia
• Fighting Fefnir Teammate of Fairy Leviathan
• Fighting Fefnir Teammate of Hidden Phantom
• Dr. Weil Enemy of Zero
• Dr. Weil Enemy of Ciel