Day Two: Favorite supporting female characterRose Tyler
Rose was an amazing character: she had great chemistry with both the leads and I shipped them, I could relate to her, she was a well developed character with flaws and strongpoints, and man she could pull at your heartstrings. When she cries, I want to cry (and, like with Doomsday, I do) when Rose laughs, I want to laugh.
Rose also had an amazing determination and loyalty. She wasn't always the nicest to the people close to her (Jackie and Mickey come to mind) but it wasn't usually intentional and mostly due to her total restlessness in her life. But she cared so much and stuck up for what she thought was right. She went after Nine even after he made her go home, she tried to save the Earth when the Doctor was still recovering. She knew who to go after when people's faces were getting sucked, she knew what the Doctor was trying to say at the space station and got everyone rounded up to play on their strengths, she didn't want to abandon the Doctor because she believed in him, and she figured out who the devil was on the rocket.
On top of that, when she was trapped in the other universe, she never gave up on seeing the Doctor again. Rose built a dimension canon and saved everyone from the parallel world in Turn Left (and she did all this without ever telling anyone her name!).
Rose Tyler: Defender of the Earth( rest of the days )