Tieria Erde: "Vowels", for the large number of them in his name. Also "Mantrap", "Titeria", and "T-chan" for his Wholesome Crossdresser stint.
In the Japanese and Chinese fandom, he's also known as ''Zetsubou-sensei'' due to the share of seiyuus and an awful lot of coincidences. Eventually parodied in one of the said show's episode.
His twin, meanwhile, became known as "Lockoff" (at least by the Japanese and Chinese fandom) as soon as he appeared in episode 9 of the first season, long before Lyle actually replaced the deceased Neil as Lockon Stratos. Eventually, "Lockon V2"/"Lockon 2.0" became popular, as well. He was also nicknamed 'Lecherous Lyle' early on in Season 2 after his playful comments towards a clearly unamused Tieria and stealing Feldt's first kiss (earning him a rather nasty slap for it).
"Prince Ali" for Ali Al-Saachez due to his badass moments and his name. It has hit Memetic Mutation with all the Aladdin pics with Ali's face pasted on them via Photoshop... Repeat after me, ''Prince Ali, Mighty Is He!
The AEU's (alleged) ace Patrick Colasour is affectionately called "Team Patrick", for Pokémon: The Series's Team Rocket and their shared habit of being quite soundly defeated and showing up again next episode anyway.
Allelujah/Hallelujah is often shortened to "Al" and "Hal" by fans. Their temporary Split-Personality Merge tends to be called "Doublelujah", for obvious reasons.
Setsuna F. Seiei, because of his past, is sometimes called "Jihad-kun". "SetLight", referring to the fact that both his English and Japanese voice actors provided their respective versions of Death Note's Light Yagami, is also popular. In Japan and China, he's apparently known as "Braindead".
The Japanese fanbase love to shorten things, so Graham becomes "Ham" and Alejandro becomes "Doro" (after the Japanese pronunciation).
Johann Trinity is nicknamed "Captain Hotpants" because of his wardrobe choice and his position as the leader of the Gundam Thrones.
Even before his alias was revealed, fans were referring to Mr. Bushido as "Bushido Bob", thanks to his obvious Samurai stylings. His Japanese fan nickname, on the other hand, is HamMask, referencing his previous nickname before donning the mask.
The red-eyed, one-armed Exia from the start of season two is commonly known as "TerminExia".
The unnamed black leader of the Earth Sphere Federation has been given the unofficial title of "00bama", a rather obvious reference to Barack Obama.
The Innovators are sometimes referred to as "The Skittles Squad", for their odd hair colours.
Which is ironic, because some fans like to refer to Trans-Am Burst as "The Power of Skittles".
Col. Sergei Smirnov has HORDES of fanatically devoted Japanese fans who affectionately call him "Kuma-san" (Mr. Bear)note based on his In-Series Nickname, The Wild Bear of Russia. He gets called Papa Bear from his western fanbase, thanks to his relationship with Soma.
Rindt is nicknamed "Swiss Chocolate Man" because of his name being one letter off/can be read as "Lindt" after the chocolate brand.
The Seraphim Gundam is henceforth christened the "Gundam Lagann".
And "Shin Musha Flag" is now the nickname for Mr. Bushido’s new mobile suit(s), the Masurao and Susanowo.
The A-Laws' Captain Goodman is more often than not called "Captain Fat Ass", or alternatively "Captain KFC", for reasons that should be obvious.
The A-Laws are sometimes called the A-LOLS.
Throughout both English and Japanese speaking fanbases, Regene Regetta is the butt of many "NEET" jokes due to his supposedly lazy nature; fittingly, the Japanese have dubbed him as "The Royal NEET".
Marina Ismail is often called "Princess Poverty", and rules over the land of "Povertystan."
"Trans-GrahAm" - Whether Graham is using the Trans-Am system,
Alternatively, Trans-GARHam, on account of Graham's general hotbloodedness.
By extension this also extends to his ultimately full of win quotes in the SD Gundam G Generation games, where he is VERY notable for the aptly named "God Graham Finger" if the player puts him in the God Gundam.
Quebeley Mark III - The Regnant due to its shape in Mobile Suit mode.
The army of Bring and Divine clones are known as both the "Red Ribbons Army" and "Bringivines".
Ribbons' mobile suit (Reborns Gundam) during the finale was actually jokingly called "Ribbons Cannon" by Tōru Furuya, Ribbons' seiyuu. Western fans generally just call it the GN Guncannon, while Asian fans call it GN Guntank.
Now also known as the "GN Two-Face Hi-Nu Gundam", or just "GN Hi-Nu".
Some fans call the 00 Raiser "God Raiser" for various reasons.
"Badass Haro" - Haros in general, as they play a much more active role (piloting Dynames/Cherudim while Lockon snipes the targets) in 00 when compared to previous incarnations.
Red Haro became known as "GARO" after it stows away on 0 Raiser and foils Revive Revival's attempted Gundamjack by bouncing into the control port that it normally occupies and forcing the 0 Raiser to dock with 00 Gundam.
"Bad Haro" for the purple, foul-mouthed Haro Nena Trinity kept inside the Throne Drei.
Billy Katagiri is known as "Billy goat."
"Zetsubou Billy", a nickname bestowed on Billy during season two for obvious reasons. The name also comes from the title of the second Death Note ending theme.
"Golden Toilet Bowl" - a nickname given to the Alvatore, due to its shape.◊
