Madara's childhood was a product of the times he lived in; the constant fighting made him a perfectionist that would keep at something until he masters it, his triumphs on and off the battlefield made him self-assured, confident, and proud of his abilities and talent. Whenever he was challenged, Madara would show is competitive nature. Like Hashirama, Madara believed that making allies with one's enemies were the only way to survive in the ninja world. His beliefs were soley based on his desire to protect his youngest and last sibling IzunaCite error: Closing </ref> missing for <ref> tag. Madara became good friends with Hashirama and the two spent most of their friendship sparing and dreaming of a world where their shinobi lives weren't wasted in pointless war. However, Madara was not immune to his clan's Curse of Hatred; falling into the curse when he severed his friendship with Hashirama to continue their clan's blood feud, hating the Senju for killing his other siblings.
Madara changed after Izuna's death. He became bitter towards the Senju, particularly Hashirama since he still had a brother. He embraced his clan's Curse of Hatred, opting to die for revenge rather than compromise or forgive. Although he was briefly convinced to set aside his grief and try to replace Izuna with the collective family of Konoha, he could never shake the feeling that he was betraying Izuna's memory. The increasing isolation of himself and other Uchiha from village politics ultimately convinces him of this, causing him to fully break with any other attachments. During his time as a Konoha shinobi, Madara did what he thought was in the best interest of the village. Unlike Hashirama's more compassionate influence, Madara took a more ruthless approach. For example, despite being allies with Iwagakure, Madara demanded that they will serve Konoha was fought the Second and Third Tsuchikage to solidify this. As his animosity towards Hashirama grew before his defection, Madara forbade anyone to mention Hashirama's name around.
After he defects from Konoha, his priorities become centered around himself, manipulating countless others in order to satisfy his own goals and putting in place multiple layers of contingencies so that nobody could ever diverge from his own intentions. As he values only power and possesses so much of his own, Madara therefore does not like to waste it on unworthy causes or unchallenging opponents, claiming disgust when he is forced to.
Madara loves fighting above all else: the sights, the sounds, even the taste of his own blood. Yet he is very disciplined, calm and focused in a fight, never allowing his failed plans or attacks to upset him, never letting superior numbers or power intimidate him, and always willing to do whatever must be done to gain victory, even if he must "lower" himself with unbecoming tactics or excess displays. This makes him versatile in combat, ever willing and able to change tactics and exploit advantages. He is perfectly aware of his talents and does not feign modesty, bluntly stating when he is stronger than his opponents and belittling them when they continue to defy him. Conversely, if he is proven wrong or somebody poses a legitimate challenge to him, he will admit it, apologise for previous remarks if necessary, and if and when he gains the upper hand, he will not drag out his opponent's suffering.
The one exception Madara makes is Hashirama. Their years of rivalry left Madara with competing feelings of respect and resentment for Hashirama. He hates to hear Hashirama's name and at the same time grows excited at the prospect of fighting him. Madara considers Hashirama the only opponent worthy of his time and will gladly postpone his own plans if it means prolonging his time to fight with Hashirama.
In his later years, after he develops his Eye of the Moon Plan, Madara becomes pessimistic about human nature, believing the cycle of battle to be inescapable. He also came to believe that humanity and the world are incapable of changing from what they were in the past. The current, "worthless" reality, he believes, is built too much on the idea of winning and losing. For this reason he is deeply committed to his plan, so much that he will prematurely end a fight he is enjoying or kill any threat, even his own clansmen, for the sake of its success.
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