Ryoma Echizen and Sakuno Ryuzaki

Pairing: Ryoma Echizen and Sakuno Ryuzaki
Pairing Name: Ryoma and Sakuno, Ryoma x Sakuno, RyoSaku, Ponta Pair
Status: Unknown
Manga/Anime Series: The Prince of Tennis (TeniPuri)
Child/ren: None

Ryoma Echizen 

Ryoma Echizen (越前 リョーマ, Echizen Ryōma) is a fictional character and the protagonist of the manga and anime series The Prince of Tennis created by Takeshi Konomi. In the series, Ryoma is portrayed as a twelve-year-old tennis prodigy who won four consecutive Junior Tennis Tournaments in America. His father is Nanjiro Echizen, a former tennis pro nicknamed "Samurai Nanjiro". At his father's request, Ryoma returns to Japan in order to attend Seishun Academy ("Seigaku"), a private middle school famous for its tennis team. Due to his cocky attitude, he constantly butts heads with some of his upperclassmen as well as anger most of his opponents in tennis matches. Still, he, along with his team, evolve as tennis players in order to win the National Tennis Tournament.

Sakuno Ryuzaki 

Sakuno Ryūzaki (竜崎 桜乃, Ryūzaki Sakuno) is the granddaughter of Sumire Ryūzaki, the Seigaku tennis club coach, and is one of the first characters who have direct contact with Ryoma Echizen.

Between manga and anime version, she has more exposure on the anime series where she's regularly seen hanging out with the Seigaku team and occasionally help them with her best friend Osakada Tomoka. In the manga, she's seldom seen cheerleading for them.

When Ryoma lost his memories at one time, she went searching for him. She tried her best to teach Ryoma tennis from the scratch in an attempt to regain his memories. Ryoma, later on, recovered his memory and wants to face Yukimura of Rikkai.

Sakuno is a kind and shy girl with long hair that she kept in twin braids. She always seems to worry about Ryoma whenever he has a tennis match to play. Inspired by Ryoma, she started playing tennis. Her progress on playing differs in the anime from the manga. While in the manga she's good enough to be seen as a good player with a potential of becoming regular, her anime version's clumsy nature becomes part of recurring gag of the show.

Her personality though on both versions suggests that she's a shy type of person. One particular difference though is that the manga Sakuno is more insightful, mature and intuitive. Sakuno chose to mostly keep her thoughts to herself and responds only to what she had noticed on Ryoma's reaction.

She has a horrible sense of direction which leads to Ryoma taking the wrong destination.

Their Relationship 

Sakuno's crush on Ryoma is clear, and due to her own shy nature, she hasn't told him. Although it's quite obvious to other people especially to some members of the Seigaku tennis club. On the other hand, Ryoma because of his dedication to tennis hasn't thought about the possible relationship with her. He does, however, shows concern for her well being and always ready to help her. He also has tried coaching in tennis even if his father tricked him to do so.

Pair Puri 

Ryoma went back to Japan before the U-17 camp took place. Sakuno is waiting for him at the airport, but due to her lack of direction sense. She ended up at departing lobby instead. She was supposed to be arrival lounge. When she realized she 's lost, someone placed a hat on her head and says she's really bad at directions. It turned out to be Ryoma.Ryoma takes the cylinder case from Sakuno's hand. He opens it and finds a certificate of recognition saying that Sakuno won a third-place position in a tournament. Ryoma says that she has a lot of work on to do but congratulates her too.

Fun fact

• Sakuno almost went near to a confession when Ryoma's lost his memories. Although, Ryoma halted it. 
• In the OVA episode 14 (chapter 306 in the manga), when Kintarou Tooyama befriends Sakuno, hints of jealousy were seen in Ryoma. "Let's go Ryuzaki" was his exact line telling Sakuno to go with him and leave Kintarou. 
• Ryoma's mother, Rinko has some resemblance to Sakuno and their personalities almost the same. In addition, Her (Rinko) and Najirou's love story is themed to be an arrogant lad falling for kind of a shy girl.