Hollow Knight

1) The Game: Hollow Knight is a game developed by Team Cherry. the game currently has 2 DLCs and 1 upcoming DLC. It's a 2-d metroidvania game that has some platforming here and there but mainly focuses on combat. And in my opinion it's one of the greatest games of ALL TIME. Great music, great art, great story, great characters and great everything. You can check for more about the game at it's wikipedia page and fandom wikia.

2) The Character: The Hollow Knight is also a character and a final boss in the game. For the first time, you can think The Hollow Knight is actually the player character but the player character is named The Knight. It's a vessel, created by The Pale King to seal away the Radiance. The True final boss of the game that you can fight on one of 3 endings. And also, it doesn't have a gender because it's a vessel. Like mentioned above.

"...Father?..." -Hollow Knight's Dream Nail dialogue, during it's boss fight, implying that it thinks the player character is its father.