Treebeard, the oldest of the Ents – shepherds of the forests of Middle-earth – has a long memory and a vast knowledge of the earth he roams and used to roam. With matters of great importance, Treebeard gives great consideration to them, such as when he first encounters Merry and Pippin, thinking them out slowly and carefully. He is a just being, doing what is right and usually not going to one side or anything. For instance, Treebeard takes Merry and Pippin to Wellinghall, which is near Methedras, the last peak of the Misty Mountains, and gives them Ent-draught and tells them stories of the Entwives.
On most matters, though, he takes things nice and slow – like all Ents do. His motto, is, in fact: Do not be hasty! An exception of this happened during The War of the Ring, when he and the other Ents moved quickly and helped to defeat Saruman, though not before having a three-day meeting called Entmoot. Fifty Ents attended the meeting and at the end of it, all of them left for Isengard, Treebeard leading them all, with Merry and Pippin on his shoulders. When they arrived there at night, Treebeard ordered Saruman to come out, but he did not, and so the Ents destroyed his machinery and the walls around Isengard. Saruman still did not come out and so the next night, Treebeard flooded the lair of Saruman.
The next day, Gandalf, Legolas, King Théoden, Aragorn and Gimli arrived and Treebeard handed the Hobbits over to them, and also invited Legolas and, with disgruntled feeling, Gimli, to come to Fangorn Forest. After Gandalf cast Saruman out of the Order of the Istari, Treebeard told Gandalf he would stay to keep watch over the tower and Saruman, while the others left, and would remain there “until seven times the years in which he tormented us have passed”.
by ~Stella~