Jack's friends and mentors from all over the world likewise come to Japan to celebrate Aku's demise.

And There Was Much Rejoicing: Even Ashi - his own daughter - was glad that Aku kicked the bucket.

This was aeons before he gained sentience and was instead just a mindless Eldritch Abomination.

Ancient Evil: In one episode which showed his Backstory, he is shown fighting Jack's world's gods before the world began.

Aku himself is so far beyond anybody else on the planet in terms of raw power that he could be an unstoppable domineering tyrant if he wanted to, but he really only intervenes personally if such cruelty were amusing to him (or to fight Jack, his archnemesisВ—and the only person capable of harming him).

Anarcho-Tyranny: Instead of a totalitarian regime where everything is strictly monitored and controlled, Aku allows the whole world to be consumed by an endless state of violence and warfare in which all sorts of villains, warlords, criminals, and monsters run rampant and terrorize innocent people as they please.

And he also happens to be a father (albeit a deadbeat one, which he wasn't even aware of until recently).

Action Dad: Aku regularly (and effortlessly) decimates entire armies, has conquered the entire universe, and is one of the few beings that can fight on par with Samurai Jack.

It's also shown that even magic such as that from the Scotsman's Celtic runes can ward him off, as can the Robo-Samurai, which is explicitly an ancient magical giant.

Aku can No-Sell just about anything else, unless it's of divine origin and even episodes like 'Jack and the Gangsters' shows Aku being defeated by the Water Goddess and her minions. The formless evil that spawned him was slain by a trio of gods who later imbued Jack's sword with the same energies, allowing it to harm Aku. Achilles' Heel: Aku is very weak to divine magic, as his Made of Evil physiology can be burnt apart easily by the magic.It ultimately leads to Aku turning his last living daughter, Ashi, into a powerful puppet that forces Jack to surrender because of his feelings for her. The result is that Aku indirectly fathered seven exceptionally deadly children who came closer than anyone else to actually killing Jack. He didn't expect the High Priestess to actually drink it. Years ago, he paid a visit to his cult and filled a goblet with his substance to humor them. It turns out that the Daughters of Aku are literally his offspring. Aku viewed this idea as a failure since Jack couldn't die of old age, but killing off his last hope of returning home in such a painful and spiteful way almost caused Jack to commit suicide. This event would up kicking off Jack's Despair Event Horizon, beginning with the loss of his sword. After Aku destroyed the final time portal by blowing it up with his eye beams, he mocked Jack for his failure to escape the future and tricked him into killing some cute, innocent animals.Unbeknownst to him, this virus began to slowly transform Jack into a smaller version of Aku, taking over his personality and driving him to the brink of madness and villainy. Aku once accidentally infected Jack with a flu he was carrying, and then withdrew to his fortress.Achievements in Ignorance: Some of Aku's closest victories against Jack happened completely without his knowledge.

To his credit, at least he was honest about it and he was a little more encouraging than her mother. Abusive Dad: Once he finds Ashi with Jack and realizes she was conceived from his essence, he forcibly bends her to his will using the extract of himself that's still within her, turns her into a demonic version of herself, and forces her to fight and betray Jack.In Season 5, Aku still calls Jack a 'fool,' but it's only once or twice. In the Grand Finale, when he captures Jack and announces his plan to publicly execute him, everyone Jack has ever helped storms Aku's fortress en masse to save him. Anyone who ever follows him only does so to feed their own personal ambitions. The only reason his approval rating hits zero percent, however, was Jack В— he showed people that a world without Aku could possibly exist. Outside of that instance, Aku seems not to care (since nothing his subjects could do can hurt him). 0% Approval Rating: In a notable subversion, 'Aku's Fairy Tales' shows Aku as aware of how his subjects view him, which leads to a clumsy attempt to persuade children to like him.

Fusionfall aku