Since a young age, Sae has been cold, blunt, and serious. He has only ever cared about becoming the best Midfielder in the world and has only had time for things that get him closer to his goal. Sae can also be arrogant and condescending, looking down on others even if they are older than him and wield organizational authority. He is egotistical in his football play but has shown to be able to restrain himself and play his position, not trying to outshine others unnecessarily. Sae is prideful as a football player, looking down on Japanese football and all who participate in it. Sae states that he would much rather die or play in Europe with a bunch of college students than play in the J-League or play on the Japan National Team. He is very confident in his skills and wholeheartedly believes that nobody in Japan is worthy of his skills as a teammate. He dislikes the fact that he was born in Japan, saying things like he was simply born in the wrong country. Though Sae is a difficult person, he is not impossible to work with. He, out of pure interest, decides to stay in Japan on a whim after hearing about the Blue Lock Project and even joins the Japan U-20 for the match against the Blue Lock Eleven. But when his interest is satisfied, he has no problem abandoning those he deems unworthy of his time. Despite Sae's arrogance, he does not mind staying in his role as a midfielder and key passer. During the Japan National Representative match, Sae gave the Japan U-20 forwards every opportunity to score, and only after repeated failures did he decide to score himself. After the game between Japan U-20 and Blue Lock Eleven, Sae is not above admitting when he is wrong, as he tells Rin that he was wrong about Japan; they are capable of creating good strikers and that their football can still change. During their childhood, Sae is shown to be much friendlier, more caring and loving towards his brother Rin. He even took responsibility for Rin destroying his toys. Sae showed concerned when Rin said he wanted to fight a stronger opponent, destroy them and die. Sae is a tall, lean young man with reddish-brown/maroon hair and slim teal eyes that are framed by an array of long underlashes just like his brother, Rin. During the National Representative match, he wears the Japan U-20 White #10 jersey with a black shirt underneath the jersey and some black gloves.

Aperance- Short curly brown hair with black glasses A black button up t-shirt and grey sweatpants Personality- Flirty Sarcastic Nice Polite