I don't usually call people by nicknames, so I'm just gonna <s> steal them from others</s> make some up and post them

Ansem- Ansemmy! (points!)
Dking'squeen- Queen
Fuzakeru- Fuz
The Summoner of Leviathan- Sol
rubah- Ruru
Faris- Fari
Calliope- Calli
Carnage- Car
SePhO_zO- Seph
Del Murder- Del
Mr. Graves- Grave person
RSL- rsl
The Captain- Cap'n
Yamaneko- Yam
edczxcvbnm- ed
Ouch!- Owie
Winged Sorceress- Sorceress
Rainecloud- Raine
Little Miss Awesome- Miss Awesomeness
Yu-Yevon- Yevie
bardock- bard
crash26821- crash
Psychotic- psy

*Hyper* *bored*