It just so happens that the ruler of the Ancient Treant wanted to meet with Cecilia. He could use this opportunity to meet with the Ancient Titan Treant. That was why Simon wanted to know what kind of person he was before meeting him.
Fennel was lost for words as he didn't expect to be suddenly asked this question. He looked towards the middle of the large clearance where a titanic tree was standing and said.
"From what I can tell, that person seemed to hold our race in high regards and is even willing to protect us himself. He is a wise and benevolent person. At the same time, he has lived through the ancient times and a powerful aura radiates off of him. It is truly unfathomable to measure such a being".
He then shook his head and apologized "Im sorry, I'm not able to fully answer your question… but I can tell you that, he is by no means an evil person".