Saito is a very stoic, quiet fellow who only speaks when spoken to or when something is worth saying. He is extremely loyal to Hijikata and will obey any order without question. In the games, he starts out very cold and almost cruel towards your character, but as you progress through his story, he begins to open up and turns out to be quite trusting and passionate of your character. 

According to the audio CD's, Saito claims he'll take swords over women any day, as he is quite the sword aficionado & could go on for hours talking about them; he is very aloof and shy towards girls in general. Saito is very thoughtful and always puts the safety of others above his own and never lets on about what he's truly thinking or feeling. This proves to be a bit of a problem, especially when he suffers blood-lust attacks from taking the Ochimizu.