There's many who stand out for me personnaly...
King (Tekken series) as he is my main character in my fave game
Sephiroth (FF7) the first enemy I really loved and hated in equal measures
Nathan Drake (Uncharted) the charismatic
So many more I could name, Ryu, Solid Snake, Tali, Lara Croft, Scorpion, even Batman.
But my vote goes to Ellie (The Last of US) as she is a character who has made me laugh, smile, feel depressed and so many more emotions in a small amount of time.
The best way to find out if you can trust somebody is to trust them.