캐릭터가 · 캐릭터를
character (in a game or story); mascot character
Example
이 게임에서는 캐릭터를 직접 꾸밀 수 있어요.
In this game you can customize your character yourself.
Word parts
From English 'character'.
Good to know
Also used for cute mascot figures: 캐릭터 상품 = character goods. For someone's personality, use 성격.