Answer: Asuma
Asuma is Ino-Shika-Cho's team leader. He sometimes wonders if they can make it as ninjas. He is also always telling Choji to lose weight.
From Quiz: What Do You Know About "Naruto"?
Answer: Seal the beast
The Hidden Leaf tried to seal the three tails; the sealing team was Ino, Sakura, Hinata and Shizune. They failed to seal the three tails because of the appearance of Orochimaru's men.
From Quiz: "Naruto": How Much Do You Know?
Answer: Tobi
Though it has yet to be confirmed by anyone from Konoha, Tobi has claimed to be the founder of the Uchiha clan, Madara Uchiha. In the manga, he has even been seen giving out orders to Pein, indicating that he may be the actual Akatsuki leader. It is unclear whether Itachi is aware of Tobi's identity.
From Quiz: Akatsuki: A "Naruto" Quiz
Answer: Gaara
Right before the Chunin exam finals, Dosu decided to challenge Gaara. Their match ended quickly, with Gaara easily killing him.
From Quiz: "Naruto": Test Your Knowledge
Answer: Two
If Sasuke were to use it a third time, there is a big possibility that he might die.
From Quiz: All About Sasuke Uchiha
Answer: Gamabunta
Jiraiya put Naruto in a life or death situation to awaken the Nine-Tailed Chakra. Using this chakra, Naruto was able to summon Gamabunta.
From Quiz: All About Naruto Uzumaki
Answer: Zabuza
Zabuza is a powerful Ninja, and also a master of the Silent Killing Technique.
From Quiz: "Naruto" Quotes Part 2
Answer: Ino
Ino cuts off her hair and throws it on the ground in what appears to be a fit of rage. In reality, she was trying to trap Sakura by creating a string of Chakra through her hair and tying it to her feet. In this way, Ino was able to use her Mind Transfer Jutsu.
From Quiz: "Naruto" Quotes Part 1
Answer: Naruto
Haku says "Naruto, kill me". Naruto doesn't understand and Haku says he is like a broken tool that is not needed anymore. When Naruto is about to kill him Haku stops him and says "Sorry Naruto". He then goes to Zabuza's rescue.
From Quiz: All About Haku
Answer: spoil the ending for the new Icha Icha Paradise book
After the timeskip, Kakashi tests Sakura and Naruto to find out how much they grew. After a day, Naruto comes up with the idea to spoil the ending for Kakashi's favorite book. Since Kakashi's Sharingan was activated, Naruto pretended to tell him. But, since the Sharingan was going to predict what Naruto was going to say, Kakashi closed his eyes and ears in horror, giving Naruto and Sakura an opening.
From Quiz: How Well Do YOU Know 'Naruto'?