__Height:__ 168 cm  

Sumire Ryuzaki is the coach of Seigaku's tennis club, as well as one of the school's math teachers. It was thanks to her that Nanjiro Echizen was able to develop his skills. She is the grandmother of Sakuno. She also has a sort-of rivalry with her ex-mentor, Mikiya Banda a.k.a. Banji, who is the coach for Yamabuki. She is always there to yell, but is also considered to be a great and reliable coach. She has a good relationship with her regulars, and participates in their recreational group activities: the bowling reunion and the beach-volley mini-tournament with Rokkaku Middle School. 

Echizen Ryoma is a young tennis prodigy who has won 4 consecutive tennis championships but who constantly lies in the shadow of his father, a former pro tennis player. He joins the Seishun Gakuen junior highschool, one of the best tennis schools in Japan, and there along with his teamates he learns to find his own type of tennis in an attempt to defeat his biggest obstacle of all: his father as well as himself.
 
(Source: Anime News Network)

Non-anime roles:
~!Gon in "Aedis Eclipse: Generation of Chaos" (VG)  Kojiro in "Brave Fencer Musashi" (VG)  Laharl in "Disgaea: Hour of Darkness" (VG)  Lola in "Grim Fandango" (VG)  Mikey in "Radiata Stories" (VG)  Pat in "Galerians:Ash" (VG)  Red in "Fraggle Rock"  Ryoko Leingod in "Star Ocean: Till the End of Time" (VG)  Silva in "Suikoden V" (VG)  Spike in "Ape Escape: Pumped & Primed" (VG)  Voice of Rita Repulsa in "Mighty Morphin' Power Rangers" (TV)  Zeldalia in "Atelier Iris:Eternal Mana" (VG)!~

An American voice actress who works for anime series of Funimation.

Ryoma Echizen just joined the Seishun Academy's tennis team, which is known for being one of the most competitive teams in Japan. Its members are incredibly talented, gifted, and athletic. With rigorous and extremely intense practices, the upperclassmen of the team expect the very best from themselves and they expect even more from the new members of the team. While most of the freshmen are on pins and needles hoping they won't get cut from the team, Ryoma Echizen is confident, cool, and collected. Some might even say he's cocky, but at least he's got the skills to back up his attitude. With his virtually unreturnable "twist serve," Ryoma is sure to make the starting team. Join Ryoma and the other first years, as they train hard, make friends, and try to find a place for themselves on the team. And meet Ryoma's cute but chronically shy classmate Sakuno Ryuzaki. She's got a big crush on Ryoma, but will he ever notice her? Ryoma Echizen is the Prince of Tennis. He may be ready for the Seishun Academy tennis team, but are THEY ready for HIM?
 
(Source: Viz Media)
 
Note: Includes one extra chapter.

Middle school students fought fiercely against one another in a national tournament. Now, 50 chosen representatives return to fight again as high school students! 
The stage is the U-17 (Under Seventeen) Japanese Representative Training Camp. Middle school students have been invited for the first time to a camp known to produce the best Japanese tennis players. National champions from Seigaku, Hyotei, Rikkai, Shitenhoji... With all the rivals from the national tournament attending, everyone eagerly awaits their reunion. 
At first, the middle schoolers do not expect much from their high school opponents. However, the training camp is not so easy! Athletes with skills incomparable to those they previously faced and their mysterious coach appear before them. Faced with numerous demanding challenges, can the middle schoolers survive in this meritocratic training camp? 
(Source: Crunchyroll)

Sumire Ryuuzaki