Dueling Shows: With Yu-Gi-Oh! ZEXAL, which aired the season after it. Both focus on middle school aged kids and card games. It helps that the creator of Vanguard actually started out as a manga-ka for Yu-Gi-Oh! R and Takahashi's (the creator of YGO) understudy.
Fan Nickname: Asaka is called rule 63 Aichi due to their physical similarities.
YandereAichi started to catch on after ride 44. Also PsyAichi.
Among his Japanese fans, Ren is often referred to as "Ren-sama".
Platina Ezel is frequently referred to as Pretzels or PEzel for short.
When Kai shows off having Psyqualia in the manga, it was quickly given the nickname Kaiqualia.
A real life example, Izumi Kitta, Misaki's voice actor, has a tendency to pull two triggers to break through her opponent's guards, and a lot of them are double critical triggers. This has earned her the nickname of Izuqualia.