Kan'u, Unchou

関羽雲長 / 愛紗

Anime
Kan'u is known as the Beautiful Black-haired bandit fighter and wields the Green Dragon Crescent Blade. She resembles her male counterpart, Guan Yu. She is also one of the main characters alongside Chouhi. Her backstory reveals that bandits killed her family, which drove her quest to ensure innocent people would never suffer as she did. She cares deeply for her friends and became Chouhi's sister after they swore a vow of sisterhood, as she felt sorry for Chouhi's loneliness. Two common recurring jokes about her are:
1) That most people who heard of her believe she is a beautiful girl, only to meet her and realize she is just normal-looking, and
2) Some female characters mistakenly believe she and Rinrin are mother and daughter, despite the fact that she is still young.
The second running gag is carried even further in Shin Koihime Musou when Kousonsan mistakes Koumei as Kan'u's daughter as well. Somewhat self-conscious about her appearance, she often finds herself as the butt of jokes from those who blatantly point out physical aspects of her, such as her age, which she is very sensitive about. Another notable gag occurred when Kan'u found a seemingly suitable male soulmate, but the relationship was to be very short-lived. She is a pure virgin, as noted in season 1's fourth episode, where she nervously admits to Karin that it was her first time when she conceded to sleep with the young ruler in exchange for Bachou's release. After Ryuubi joins them in the second season, she becomes a role model for Ryuubi, who later decides to make a vow of sisterhood with her as Kan'u's older sister (since Kan'u already made a vow with Chouhi as her older sister). Kan'u at first felt it was inappropriate because she is older than Ryuubi, but by the beginning of the third season, she accepted calling Ryuubi her Aneue (older sister).
Visual Novel
Arguably the main heroine of the first game, Kan'u shows up shortly after Hongo is transported back in time and saves him from a group of bandits. Due to Hongo's costume and manner of speech, she subsequently mistakes him for the "Messenger from Heaven" and becomes the first person to vow her loyalty to him. Kan'u remains the driving force behind the Hongou/Shu army and displays many heroic actions in the war, often being the leading voice for the other girls as well as the motivator of the group. However, due to her past, she strongly rejects Hongo for calling her a girl, stating, "Nothing as weak as that!"
In the sequel, Shin Koihime Musou, Kan'u is relegated to the position of Ryuubi's second in command and confidante. Here she is a very strict general and disciplinarian, especially towards Ryuubi herself (due to Ryuubi being a rather naive and reluctant queen) and Kazuto (likely out of jealousy over Ryuubi's closeness to Kazuto, since she herself in fact harbors romantic feelings toward him).