Jinguuji Ren  is a student of Saotome Gakuen, sorted into S Class.

Ren is the youngest son of the Jinguji family, because of a decision given to him by a relative, he was forced into Saotome Academy to become an idol and serve as the Jinguji family's tool for publicity.  
He is a flirtatious, adventurous and carefree person. Ren is known to be very famous among the ladies and never fails to charm them with his sweet talk. At times Ren is showed to be selfish but very passionate when it comes to music. He also gives nicknames to his bandmates. In addition, he seems to be introverted in the sense that he keeps his hardships to himself, until Haruka gives him the opportunity to speak openly.

Jotaro Kujo (空条 承太郎, Kūjō Jōtarō) is a fictional character from the Japanese manga JoJo's Bizarre Adventure, and the protagonist of Series 3. He has a recognizable attire of nhkjllma blue trenchcoat-length school uniform jacket with yellow chains on the collar.

He also wears a trademark blue hat which, while torn in the back, often seems to blend with his hair. While they are first shown as being completely separate, later publications cause more uncertainty as to where his hat and his hair actually meet. His hat is most likely a Japanese student cap that was normally worn along with the gakuran prior to the 1970s.

He is also known for a quick and short temper. He is the only JoJo to make an appearance in four different series.

Jotaro is Holly Kujo's son and Joseph Joestar's grandson. When Jotaro first appears, he turned himself in to the police because he believes his Stand is an evil spirit possessing him. To demonstrate, he steals a gun from a prison guard, and tries to shoot himself in the head -- a phantom hand emerges from his arm and catches the bullet, however, only Holly sees the hand. This act naturally earned the widespread fear of the guards and other prisoners towards him.