(Note: As mentioned before, because these cases not only involve the death(s) of a particular character(s), but can also delve deep into a show's storyline, naturally spoilers will be involved. Also, most of the titles covered are either for older teen or mature audiences.)
Case #3
Title: Gungrave
[Official Site - English]
Character: Bear Walken
Episode: 23
Description: One of the top executives in the mafia group known as Millennion. An enforcer and absolutely loyal to its leader, Big Daddy, "The Family", and the "Code of Iron". Tall, solemn, imposing figure respected by everyone in the organization. Average black skin tone; Gray beard, black, short, swept-back hair. Always wears a pair of shades and a suit, except at home, where he is normally seen wearing a kimono in his Japanese-styled abode (follows a strict samurai-esque edict). Dotes heavily on his only daughter, who he raised alone after her mother (presumably of Japanese descent) died when she was younger.
Background: Brandon and Harry, the two central figures in the series, are street punks and childhood friends that find themselves in deep water after Harry crosses paths with the wrong people, including a rival gang and its leader's dangerous hitman brother. With three of their friends already dead, along with the uncle of a female friend of Brandon's, Maria, the two come close to losing their own lives until Bear appears to avenge the life of Maria's slain relative, who was an old friend of his boss, Big Daddy, that he had recently visited on his behalf. After the incident, Brandon and Harry go on an angry tear through the city and become one of its most feared forces. Harry, however, begins to feel restricted by its confines and wishes to expand elsewhere, leaving Brandon to take care of Maria.