Answer:
1. Grover was timid and lacked confidence. He was not obviously brilliant as well"
"Grover was an easy target. He was scrawny. He cried when he got frustrated. He must've been held back several grades, because he was the only sixth grader with acne and the start of a wispy beard on his chin".
"Grover has big dreams. Perhaps bigger than are reasonable. To reach his goal, Grover must first demonstrate great courage by succeeding as a keeper, finding a camper and bringing him safely to Half-Blood Hill."
2. He becomes a very brave, loyal
and selfless person as well as a great protector of his friends who was willing to give up his personal comforts for those of his friends.
"I'm a satyr […] We don't have souls like humans do. [Hades] can torture me until I die, but he won't get me forever. I'll just be reincarnated as a flower or something. It's the best way."
"Look, Percy, I'm not as smart as Annabeth. I'm not as brave as you. But I'm pretty good at reading emotions. You're glad your dad is alive.
3. Grover, he starts out as Percy's best friend that he met at the school he goes to, Yancy Academy. He is described as an outsider at school like Percy which gives them something in common. When Percy finds out he is a demigod, it is revealed that Grover was his keeper and a satyr. Keepers find campers and bring them back to Camp Half-Blood safely. Grover failed doing this with Thalia, Zeus' daughter, and it was ruled that he also failed to bring Percy to camp safely. Grover has to now prove himself by bringing Percy and Annabeth back from their quest safely. He succeeds at this.
4. Grover love of nature and his desire to not succeed after being labelled a failure helped him to change.
According to the Council of Cloven Elders, Grover did not bring Percy safely back to Camp Half-Blood the night the Minotaur attacked, and he also failed to bring Thalia to safety (which hurt him badly). That means that, he has failed twice at being a keeper. Grover's last chance to win a searcher's license is to safely bring Percy and Annabeth home from their quest.
Grover's dream is to search for Pan, a privilege that only few satyrs are granted and he's incredibly passionate about nature. So, he ensured he didn't fail again in order to achieve his dream.
"I was supposed to escort Thalia to camp. Only Thalia. I had strict orders from Chiron: don't do anything that would slow down the rescue. We knew Hades was after her, see, but I couldn't just leave Luke and Annabeth by themselves. I thought... I thought I could lead all three of them to safety. It was my fault the Kindly Ones caught up with us. I froze. I got scared on the way back to camp and took some wrong turns. If I'd just been a little quicker..."
"But for the satyrs, Pan was our lord and master. He protected us and the wild places of the earth. We refuse to believe that he died. In every generation, the bravest satyrs pledge their lives to finding Pan. They search the earth, exploring all the wildest places, hoping to find where he is hidden, and wake him from his sleep."
Explanation: