In books and in-game Philippa!
Philippa is one of the few characters that come close to my own personal traits. If I had different personal traits once, then that slowly started changing with the time and my experiences, until I became enough confident.
Philippa is a character with a very strong character, also very capable. She can become ruthless if she has been betrayed or if somebody tries to ruin the path to her goals, or to take what she has achieved from her. That's exactly how I've always responded in such conditions, as one of the brightest examples, anybody could spot from first sight.
As I always say I can be both good and bad, it depends on you - that applies for Philippa. Philippa can be funny, helpful and good, but also very ruthless, but she is also very clever and has a full control of herself, because she knows exactly what she is doing, which is something for applause in some moments and in others it is her death trap.
Her natural abilities in real life would probably cause a lot of jealousy from the people around her, which sooner or later will turn any good person into a villain, because when people hate you for your abilities you struggle.