I'm pretty sure you mean Cassandra who thinks she's the last real human being. You got the quote wrong too, it's "a bunch of wibbly-wobbly, timey wimey, stuff"
When you ask for the Doctor's third companion, the answer is NOT Donna Noble. If you mean the third Companion of New Who, that would be Jack Harkess. As written, the correct answer should be Ian Chesterton.