Answer: Kushina
Before Mito died they sealed the Kyuubi inside Kushina because of her special chakra. Kushina is also Naruto's mom.
From Quiz: The "Naruto" Quiz
Answer: Kakashi Hatake
Kakashi received his Sharingan from his friend Obito who died during one of their missions together.
From Quiz: Characters of "Naruto"
Answer: Sakura, Ino, Tenten, Temari
Sakura, Ino, Tenten and Temari all fancy him or think he is good looking. For example, when Temari saw Sasuke for the first time, she said "well well, local hottie."
From Quiz: The "Naruto" Trivia
Answer: Shikamaru
Choji always hangs out with Shikamaru and when fighting Jurbo he says Shikamaru is his best friend. It was Shikamaru who made friends with Choji when they were kids. They have been friends since.
From Quiz: What Do You Know About "Naruto"?
Answer: Obito
Kakashi managed to get his Sharingan when Rin cuts out Obito's eye at Obito's request and replaces Kakashi's already dead eye with it.
From Quiz: "Naruto": How Much Do You Know?
Answer: Kakuzu
Kakuzu is the oldest member in Akatsuki, and he has lived an extremely long life due to his unique abilities. He possesses five hearts in his body and can replace them at any time in order to extend his life. During his battle with several Konoha shinobi, he states that he had previously fought with the First Hokage.
From Quiz: Akatsuki: A "Naruto" Quiz
Answer: Gamabunta
Gamabunta is a giant Toad that can be summoned by Jiraiya, Naruto, and the Fourth Hokage. He is the father of Gamakichi and Gamatotsu.
From Quiz: "Naruto": Test Your Knowledge
Answer: Barrage of Lions
Using his Sharingan, he copied Lee's taijutsu and used it as his own.
From Quiz: All About Sasuke Uchiha
Answer: Sakura Haruno
He has a big crush on Sakura, but the only person she likes is Sasuke Uchiha.
From Quiz: All About Naruto Uzumaki
Answer: Temari
Temari says this as she defeats Tenten in the Chunin Exam Preliminaries without breaking a sweat.
From Quiz: "Naruto" Quotes Part 2
