Extra Characters...
Here's a little description on the main characters of Gravitation...
PS. The photos goes as anime-ova-manga...
Taki Aizawa...
OVA - MANGA
ASK's leader and vocalist. He's arrogant and overconfident. There's more to him than looks though, his qualities as a strong singer are more than enough to make up for his personality. He hated Tohma Seguchi for his original works. He’s seen in both the anime and manga. His Birthday is on June 1 and his blood type is A. He’s 22 years old and his height is 175 cm.
Ken-chan...
OVA 
As ASK's song writer, composer, arranger and keyboardist, he does anything. He's a gentle person. He’s seen in both the anime and manga. He was born on March 17 and is now 23 years old. His height is 180 cm.
Ma -kun...
OVA 
ASK's guitarist and in charge of the band. He's a total playboy, and anything will do. He's smarter than Taki too. He’s seen in both the anime and manga. He’s born on October 4 and is now 23. His height is 178 cm.
Tetsuya Ukai...
ANIME - OVA 
He’s Noriko’s husband in the manga. He is a university professor and a well-known food critic. He was born on January 26 and his height is 170 cm.
ARK...
ANIME - OVA 
He's very shy, honest and dependable. He and K share a common past, he saved his life when they were mercenary soldiers, but they can't work out their relationship about those good 'old days. He's loyal only to Judy, adores her, pity she doesn't hold him in the same regards. He’s found only in the manga. His birthday is on May 2 and his blood type is AB. His age is 32 and his height is 190 cm.
Yuuji Nakano...
ANIME - OVA 
He's a wannabe actor and is unemployed right now. He really likes his little brother, maybe too much. He'll eat anything. As Hiro's older brother, he's really a good guy, bad sometimes but that's the way he is. In regards to the author (Yuki), he really likes the guy and admires his style. He’s only seen in the manga though… His birthday is on May 5 and is currently 25 years old. His blood type is A, and his height is 177 cm.
Judy Winchseter...
ANIME - OVA 
He is K's wife. She's a mother of one child. She's a hardcore professional, and her personality reflects that. She also knows K's full name .. Claude K. Winchester. Only seen in the manga though. She’s born on September 10 and her age is now 32. Her blood type is O and her height is 174 cm.
Michael Winchseter...
ANIME - OVA 
He’s only seen in the manga but he’s K’s son. Born on March 17 with a blood type of O, he’s only 5 years old.
Kumagoro...
He’s the cute little toy rabbit Ryuichi always carries around with him! He’s Ryu-chan's best friend so he talks to Kumagoro a lot. He's seen in the anime, manga and OVA!
Uesugi Mika...
OVA - MANGA
She plays a role in the anime since she is Tohma’s wife and Yuki & Tatsuha's sister… ^_^