
Saika also murmurs Hachiman's first name during his sleep.Saika always calls Hachiman by his first name.It could be a subtle reference to a popular Shounen Jump manga/anime, "The Prince of Tennis", due to his nickname ("The Prince") and his current sport (Tennis).The females in his class often refer to him as "The Prince"."Yeah! We all said we'd just watch over them, because they'll definitely deny it if we asked." Saika to Tobe.(for example, when Miura wanted to use the tennis court, he didn't say anything.) He is peaceful and doesn't like creating or being involved in conflicts. He is bashful and often shown blushing, especially to Hachiman. He is able to get along with everyone without any hard feelings. In contrast to his outward appearance, he is trying to be manly as possible, and doesn't like when his gender is mistaken. This personality often causes his comrades and teammates to pursue victory in athletics or tennis.

Because of his feminine characteristics, most girls in the school call him "prince". Saika has a soft and kind demeanor, as well as a feminine appearance, which causes Hachiman on multiple occasions to "forget" Saika is a boy. He has some skill in observation, as he can figure out the stress and difficulties of Hachiman just by paying attention. In episode 11 of season 2, he is the captain of tennis club, where he shows his leadership quality when playing with others. He also demonstrated his acting skill in Hina's yaoi play for class 2F for the Cultural Festival. He was able to motivate his team with "cuteness". It was also shown that he was the captain of the red team in the Bo-Taishi event at the Athletic Festival. He has great leadership qualities pointed out by Hachiman. He also wears a black bracelet on his right wrist. In the light novels, his clothes are exactly the same as in the anime, except his jacket is initially light blue and changes into green later in the novels, and his undershirt is short sleeved with a blue collar and is white.

In the manga, his shorts are slightly longer and his undershorts are not visible. In the anime, his outfit consists of a dark and light green sports jacket, similar colored shorts with black knee length tights underneath, and wears a v-neck shirt that is long sleeved and a lighter shade of green in color. He is seen wearing his gym uniform throughout most of the series, often accompanied by his tennis racket, a towel around his neck or both. He has short, light grey/silver hair, large, sparkling blue eyes, and light skin tone.

Hachiman sometimes "forgets" that Totsuka is a boy. Saika has a soft, feminine appearance, and on occasion is mistaken as a female.
