Seventh Quest

Seventh Quest is a Japanese manga series published by Shueisha in Weekly Young Jump magazine since January 11, 2019. The series is a seinen, meaning it is meant for readers 17 and older, and is set in a fictionalized version of ancient Japan.

Synopsis
The series follows Akihiko Ichiko, who is the seventh son of King Daisha Honami, born from an affair. However, due to a prophecy that his seventh child would one day murder him, Daisha abandoned Akihiko, who, now a nineteen-year-old young-adult, has sworn to kill his father and complete his destiny.

Main

 * Akihiko Ichiko - the main protagonist of the series who is the seventh son of king Daisha Honami, who he is on a quest to kill.
 * Machiko Kajikawa - a would-be ninja that isn't particularly good at what she does and has declared Akihiko her master.
 * Daiji Honami - Akihiko's half-brother who later turns against his family due to his father's increasing madness and temper.

Supporting

 * Ichiko Iwatani - Akihiko's mother, whose first name he adopted as his surname. She sadly died, with her death fueling his quest.

Antagonists

 * King Daisha Honami - Akihiko's father who is a man driven mad by his own hatred and fear, swearing to kill his son before he can.
 * Atomu Honami - Daisha's firstborn and favorite son who he spoiled most of his life, creating quite the ego in him that his other brothers despise him for.