Relationships[]
Louise de La Vallière[]
Louise is Saito's main love interest throughout the series. In season 2, It is revealed that Saito is in love with Louise and even confesses it to her. Louise didn't say it verbally, but both know she feels the same way for Saito. At the end of season 2, Saito and Louise make vows ceremony as commitment to each other in that flowers linked to each other. There is no real wedding ceremony.
Although he acts a bit perverted at times, this does not mean Saito does not think of Louise. Similar to how she feels whenever he is becoming intimate with another girl (specifically with large breasts), Saito can get very upset when it comes to Louise and other men. He dislikes Julio for his "snobbish" interest in Louise, especially since he is adored by all the other young girls in Tristain Academy (including Louise). He becomes extremely jealous and calls him a bastard whenever he tries to touch Louise or gain her attention. When Wards was introduced into the series, Saito took an immediate dislike to him since Wards was engaged to Louise. When his friends dragged him into a hole to peep at the girls while they were bathing, Saito was extremely protective of Louise and stopped them (punched them all in the faces) before they saw her. He uses the name "My Louise" several times in the light novels when he feels jealous toward other guys. This is definite evidence of his strong feelings for Louise.
His partner, the talking sword Derfflinger, was also the partner of the familiar Gandálfr from six-thousand years ago. His advice and comments never reflect well on Saito. Saito protects Louise because he is her familiar, and it is later shown that he has feelings for her as well, claiming "All that he is good at is protecting her." He is revealed to be a Gandálfr, a familiar who exists to protect a Void Wizard as they cast their spells. Even when this fact becomes known to Louise, she still physically assaults him, while Saito is seen often shrugging it off as his fault. Saito was given the nickname "Our Sword" by the head cook in episode three, where Louise takes Saito into town to purchase a weapon for him, which happens to be the legendary sword Derfflinger. At the end of Season 2 he is killed in battle but is revived by a fairy (who was in fact the same fairy who revived Guiche). They both thought that they were saved by a fairy, but the fairy was actually an elf, Tiffania.
Derfflinger[]
He is Saito's talking sword and partner. They are on very close terms as they are always seen together. Derfflinger usually gives Saito advice regarding to his love life and combat.
Siesta[]
Siesta is in love with Saito and he is attracted to her mainly because of her guardian angel features, but also her kind nature. Siesta treats Saito with a lot more care compared to Louise's tsundere personality. Saito thinks of her as a friend as he would protect her from danger and harm.
Henrietta de Tristain[]
The princess of Tristain that Saito was almost immediately charmed by her first appearance. Unlike most men, Saito or Prince Wales see Henrietta as a girl less than a princess and tends to act casually towards her certain times that annoys Louise and Agnès. She is very pleased of Saito seeing her true character and gets in romantic affairs with him throughout the series, during one of their encounters she secretly asks to be her bodyguard and doesn't mind undressing in his eyesight. After having their fourth and proper kiss, Saito tells her though he understands her intentions he cannot leave Louise's side as she is his sole reason for living. Henrietta agrees with the situation but also comments she won't back away from her feelings (perhaps going as far as requesting a second marriage with Saito).
Tiffania Westwood[]
A female elf with big breasts whom Saito meets at the end of season 2 after saving his life. She later becomes Saito's second master.