"Yosuke Aiba is a main character in the Japanese manga series ""My Affair With a Ghostly Girlfriend"". He is a young man in his early twenties, who appears to be a bit of a loner but is generally kind-hearted. He is a student who has recently moved into a new apartment, where he soon finds himself encountering a ghostly figure.

The manga series revolves around Yosuke's interactions with this ghostly girlfriend, who he eventually falls in love with. As a character, Yosuke is portrayed as being shy and reserved in the beginning, but as he becomes more involved with the ghost, he opens up and becomes more confident.

One of the most notable aspects of Yosuke's personality is his loyalty. Despite the challenges he faces in his relationship with the ghost, he remains committed to her and is often willing to go to great lengths to protect her. He is also shown to be quite selfless, putting the needs of others before his own.

Yosuke's character arc in the series revolves around his growth from a reserved and introverted young man into a more confident, assertive individual. As he becomes more comfortable with his ghostly girlfriend, he starts to open up to the people around him and become more involved with the world.

Overall, Yosuke is a complex and well-crafted character that adds depth and emotion to the series. His loyalty, kindness, and selflessness make him a likable protagonist, and his journey of self-discovery and personal growth makes for engaging reading."