Erwin von Arnim

Erwin von Arnim is one of the main protagonists of the series. He is the 5th son of the Arnim Knightdom and is the 1st retainer to Count Wendelin von Benno Baumeister in the Helmut Kingdom. He is also Wend's best and 1st friend.

Background
Erwin was Wend's first retainer and personal guard as they attended the Adventurer's Academy together. He is a skilled swordsman and adventurer serving within Wend's party.

Appearance
Erwin has blond hair and blue eyes. In his initial appearance, he wears a suit of metal armor and carries on his person, a sword.

Personality
Earnest and trustworthy, Well always can trust on Erwin. He can be a bit stubborn as well as narrow-minded but all in all he's a good person.

He is also very picky when it comes to girls and he can become obsessed with them to the point hat he wants to impress them to win their heart. When finding out that the girl he is so smitten with already has someone else, he gets extremely heartbroken to the point that he doesn’t notice women trying to appeal to him at a group marriage interview for Wend’s retainers. It takes him over a month before recovering back to his old usual self.

Background
Erwin is the fifth son of a noble family who owns a village with a populace of 500. His family's financial situation is similar to Wend's and as the family's 5th son he won't inherit their wealth. So to make his living, he plans on using his sword talent (to which he trained his butt off) to pass the scholarship exam and become an adventurer (which worked very good, since he's the top of the class in terms of swords). He then met Wendelin and they hit it off immediately, becoming very good friends in the process

Sword Talent

 * Immense Prowess - Erwin has a great prowess with the sword, evidenced by the fact that he is the top swordsman in the Adventurer's School. His prowess and potential is so immense that even the Knight Commander Warren, the champion in the Sword Category of the Tournament, was impressed and decided to take him under his wing for training.
 * Versatile Swordsman - Since first training with his wife (then fiancee) Haruka, Erwin discovers that he has much higher talent for Japanese Swordsmanship (specifically 剣術 - Kenjutsu) than Traditional Swordsmanship, but his technique is not sharp enough for 抜刀術- Battōjutsu and his reflexes are not fast enough for 居合術)- Iaijutsu just yet. This is further evidenced that he can wield a magic katana while having normal human mana with ease, showing his diversity in his swordsmanship.

Bow and Arrow Talent

Wendelin von Benno Baumeister
Erwin considers Well his best friend as they both come from similar backgrounds and circumstances. There relationship is good and can be sometimes stingy if their words contradict. Wendelin on the other hand, is extremely furious and envious of Erwin as growing up, he never had any childhood friends specifically girls that have love for him.

Haruka Fujibayashi
Erwin became instantly attracted to her, developing extremely strong feelings the first time he saw her. Since they are both acting as bodyguards and are both sword users, he uses those facts as an opportunity to get close to her, however she is unaware that he has any potential feelings for her.

Erwin begins taking swordsmanship lessons from her, finding that he has more talent for Japanese-style samurai swordsmanship than for traditional style. He wishes to ask for Haruka to be his wife, but her brother Takeomi attempts to intervene. After Wendelin defeats Takeomi in a duel, he explains to her that Erwin wishes to marry her and she accepts the proposal.

Following their engagement, they spend a significant amount of their free time getting close, and their relationship blossoms. She continues to instruct him in samurai swordsmanship. The two stay with each other nearly all the time, fighting side-by--side.

Leah
Erwin didn't really think much of her back then. But Leah is the other way around. She was attracted to him on first sight. She sometimes gets fantasies of having dates with him, where she gets a lot of spanking from her cousin, Baumeister Earldom's head maid, Dominique. He was urged by Haruka take her as his wife, which took Leah by surprise, with immense happiness. Alongside Anna, they got safely engaged.

Anna
He and Anna are childhood friends, and a dilemma in the Arnim knightdom made her escape and go straight to the Baumeister Mansion, to meet Erw and possibly get married to him. It was revealed as since he was neglected for being the 5th son, she was the only one who could relate and communicate with him. It is hinted that she has feelings for him since the first place she went to away from their knightdom was to go to Wend's to see Erw. She officially gets safely engaged to Erwin alongside Leah on the same day of her arrival.

Trivia

 * Erwin has a deep love and fetish for girls with Japanese features.