I wish there was a list somewhere of all the nicknames Gundham gives everyone. So far the ones I know are
>Supreme Overlord of Ice- Gundham
>The Dark Lady/Queen- Sonia
>Swordmaster of Asura's Spirit- Peko
>The Alpha and the Omega- Hifumi
>Colossus of the Gods- Gonta
>Clown Prince of Lies- Kokichi
>Ebon Witch- Celeste
>Guardian with Hair of Flames- Leon
>Epitome of Charlatanry- Yasuhiro
>She Who Reigns- Sakura
>Shepherd of the Morning Star- Shuichi
>Apostle of the Underworld- Hiyoko
>Avatar of Servitude- Kirumi