The main hero of the series. He is an archaeologist on a mission to search for - in order - talismans, demon portals, animals with talisman powers, Oni masks, and demon chi objects that were used to imprison Shendu's siblings. Though he's quite likely the only archaeologist on the planet up to this job (thanks to being Jackie Chan), he'd rather be on a dig or minding his Uncle's antique shop.
Jackie's uncle and Jade's great-uncle. Runs an antique shop that is more of a homebase for the heroes than the high tech government agency. He's actually the cousin of (one of) her parents...they think.
Deconstructed in a Season 4 episode, when he was overly demanding and rude to Tohru (even more than usual), which caused Tohru to get mad at him, resulting in both not wanting to trade a word with each other. Later, when Tohru gets captured thanks to this, he realized how much of a jerk he was.
Catch Phrase: "One more thing", "Yu Mo Gwai Gui Fai Di Zao - Evil demons and malevolent spirits, be gone!", "Magic must defeat magic!", "[X] is not important!", "You want a piece of Uncle?" and "You want Uncle to do X? Yes/No? Then let uncle work in peace!"
Old Master: Who taught Jackie his martial arts and Tohru his magic?
Running Gag: Hitting Jackie in the head with a two-fingered strike every time he does or says something wrong. He did this also to Captain Black, Tohru, Jackie's Dark Side, Daolon Wong, Hsi Wu, Super Moose, and, at least twice, himself.
Beware the Nice Ones: Normally when the Tiger Talisman splits a person into good and evil twins, the good side is usually a sickeningly good wimp who is too scared to fight. In his case, though... it's just him. As he normally is. And still a Badass.
Big Good: So good, that after accidentally wearing an Oni mask, he is completely uncorrupted by it until Tarakudo tricks him into releasing Shadowkhan.
Butt Monkey: Only Jackie and the Enforcers can top him here.
Contagious Cassandra Truth: After witnessing demons and magic first hand, he tries to report it to his superiors, but they decide he's gone crazy. He has to take Rorschach tests where he thinks all the images are demons!
Overshadowed by Awesome: He's the badass leader to a secret agency equipped with state of the art weapons and scientific equipment. But compared to Jackie, his family, the J-Team and the supernatural villains, he just can't compare.
I am the keeper of the talismans. I am the apocalypse of which legend speaks. And I am, for once and for all, your executioner.
The fire demon and main villain of seasons 1 and 2, though he pops up sporadically throughout the show. Pre-series he was sealed into a stone statue and his talismans were scattered. Finding them is the focus of seasons 1 and 3.
And I Must Scream: Being trapped as a sentient statue for 900 years can take its toll.
All Your Powers Combined: The combined powers of the Talismans were really his powers separated from his body. With them, he can change from his statue form to his true form.
The statue form can be escaped with a single talisman (the rat, who grants "motion to the motionless"). The rest give him power but the rat is what gives him life.
Breath Weapon: Even when locked away in statue form or possessing Valmont, Shendu was capable of breathing a torrent of flames.
Butt Monkey: Abused by his siblings for not trying to free them.
Chronic Backstabbing Disorder: Valmont, Dalong, etc. Anyone he works with he eventually betrays. The sole exception was his efforts to free his demon brethern, and thats largely because he was too terrified of them after the last time he betrayed them.
Smug Snake: Especially in season 2, where nothing goes the way he wants it to, he is constantly harrased by his terrifying siblings, and is constantly arguing with Valmont whose body he has to share (to the point Valmont manages to knock him out- he was actually trying to kill him and risked his life to do it, just because he was sick of him). In season 3 he gets his Talisman powers back only to be immediately resealed, and after that is stuck as a prisoner of Section 13 until the finale.
You Have Outlived Your Usefulness: Shendu betrays Valmont and the Enforcers after getting all his talismans because he reasons that Dark Jackie was the one who brought them to him, not Valmont and the Enforcers. In season 2, he sends Finn, Ratso, and Chow out since they no longer needed to carry the Pan'Ku Box. Later, he tries to do this to Hak Foo, but Valmont doesn't want to be alone with him. He even lampshades it with Daolon Wong after backstabbing him.
"I may be a noble dragon, but I'm also a Demon Sorceror. And not known for keeping promises."
This suit costs more than your life.
Jackie Chan. Finally, we meet. It was nice knowing you.
The crime boss of the crime syndicate, the Dark Hand. He is also the main villain in seasons 1 and 2.
Demonic Possession: By Shendu. It's not full-out possession as Du was aiming for Jackie, resulting in Valmont and Shen-Dy constantly bickering and fighting for control, as thanks to a spell Du was unable to leave until his siblings released him.
Demoted to Extra: From the third season onward. In season five, his only appearances are two brief, non-speaking cameos.
Diabolical Mastermind: He's the one running the Dark Hand, and the driving force behind the first season.
Kansas City Shuffle: After Shendu betrays him, Valmont plans to use him as a diversion for Jackie while he steals his treasure. Another one is after Shendu is killed by Jade, therefore losing his palace and treasure, Valmont has managed to get all of the talismans for his crimes.
The Other Darrin: Voiced by Julian Sands in the first two seasons and by Andrew Ableson in the rest.
Even Evil Has Standards: Played with. Shendu asks they give him another chance by using the Book of Ages to escape from the Netherworld. They're initially against it, since they seem to fear the book's reality warping powers, but agree to let Shendu use it since they realize their situation is rather desperate.
Large and in Charge: All of them except Hsi Wu, who is still taller than most humans. The rest are about as big or bigger than Shen Du, and all of them make it very, very clear that they are his bosses, since he lost any equality privileges when he left them to rot in their prison. Inverted with Po Kong, ironically, who is so lazy she is the least bossy demon despite being the largest by far.
Butt Monkey: Almost every episode he's in usually ends up with him getting injured and he's the only big bad who gets thrown in prison and loses his powers Drago did get thrown in Section 13's prison at the end of his debut episode and near the series finale, he loses his fire demon chi, but unlike Wong, Drago actually managed to escape Section 13 in the season 5 premiere and gain back his fire demon chi along with the other 7 powers in the penultimate episode. If being defeated on a regular basis wasn't bad enough, some of his defeats may have an added twist. When he immobolized Jade and attempted to transfer the talisman powers she accidentally absorbed, Wong ends up absorbing his own spell and immobolizes himself. When he makes Jackie, Jade, and Tohru mute, deaf, and blind respectively, the episode ends with everyone turning back to normal but he is afflicted with all 3 disablities. In season 4, Tarakudo decides to break the Dark Hand out of prison, but not Dalong Wong. Captain Black even treats this as good news to help Uncle calm down. Even when he escapes prison, it was due to good behavior. His last appearance is being stuck in the past where Jackie tricks the past Dark Hand into taking Dalong Wong prisoner for interrogation and keep in mind that Wong has lost his powers and at this point in time, the Dark Hand has plenty of resoruces including advanced technology weapons.
Butt Monkey: Despite being the most powerful of Oni Generals and being the sole named Demon General, Ikazuki is often at the butt of all jokes. First by being revived without a body, then by literally being at Finn's butt for his debut episode, and finally being "creamed" between Viper and El Toro's bodyslam.
Casting a Shadow: Summoning the Shadowkhan and spreading darkness are the main powers of the Oni generals.
Demonic Possession: When an oni mask is placed on the face of the user, they are still conscious of their actions, but are greatly influenced by the mask, though eventually it will completely take over. Finn wasn't affected because the rat talisman awakened Ikazuki who was accidentally placed on his butt.
Body Snatcher: Once the mask's host uses their Shadowkhan, they begin to have equal control of the users body, whether the user (namely Captain Black, Finn, Paco, Jade and Valmont) want them to or not.
Intangible Floating Demon Head: Tarakudo. Makes him a very difficult enemy to fight, but also forces him to rely heavily on his minions. He still seems to prefer it to having a real body, though, since the only way he would get that is if someone found the mask that can seal him away.
Heart Is an Awesome Power: The 'minikan' that one of the generals can summon. They're not demonic ninja like the others so they can't beat up enemies in a straight forward manner. However, they can eat the shadows of humans which not only makes them stronger but incapcitates the victim. As Tarakudo says, one has to make use of their particular strengths.
Living Shadow: The Shadowkhan, Elite Mooks who literally come out of the shadows. They have been around since season 1 but their role and backstory are expanded to be revealed as Tarakudo's private army, and come in eight additional varieties.
Sealed Evil In A Mask: All of the Oni generals, and Tarakudo's ultimate fate. By extension, the Shadowkhan, control of which are the main reason the human villains want the mask in the first place.
Red Oni, Blue Oni: In this trope, Tarakudo is a blue oni and Ikazuki is a red one, which is ironic because, in literal terms, Tarakudo and Ikazuki faces are red and blue respectively.
Person of Mass Destruction: Once all nine demon generals are released, they collectively possess enough power to eventually cover the entire world in darkness. Presumably, if Tarakudo were not a floating head, he could do this all by himself.
Summon Magic: Each Oni general commands a tribe of Shadowkhan and, as per usual, can summon them at will. Shen-Du commanded a tribe of Shadowkahn because he magially manipulated one of their masks.
Weaksauce Weakness: Onions are basically kryptonite to the oni. Even the nigh invincible Tarakudo will retreat if faced with the vegatable. This only applies to the oni themselves, however. A human/oni hybrid wearing a mask is completely immune.
Surprisingly, onions are not the final ingredient to defeat him for good. His true weakness is the significantly rarer hair of a samurai.
Xanatos Gambit: The Oni generals are released whenever all nine masks are assembled in one place. Since Tarakudo is the only one that knows this, whether he gets all the masks, or the J-Team does, he still wins.
Shen-Du's Elite Mooks in seasons 1 and 2, barring a temporary lapse when a demonically possessed Jade seized control of them. Later revealed to originally serve Tarakudo, and to actually come in nine different forms, or "Tribes", of which Shen-Du's Ninjas were only one.
The Corruption: To anyone who summons them who isn't already evil, and sometimes even then. Notably its the summoning that starts it, not the Oni masks, as the corrupting only sets in once they are called upon, not to mention when Jade had her Tarakudo tattoo. Though more noble-minded people can resist for a time, the oni's influence will dominate the host eventually.
Giant Mook: The Sumo Khan and, eventually, the Leech Khan.
Eldritch Abomination: The Squid Khan, who are the only Shadowkhan whose face we see, which turns out to be a hideous demonic-looking Cthulian monster. Presumably, all Shadowkhan are equally as horrifying underneath.
Mook Carryover: Inverted. They are introduced as serving Shen-Du, but originally served Tarakudo, despite the latter not appearing until season 4. Played straight with Shadow-Jade and to a lesser extent with anyone who put on a mask, though in both cases the summoner became Brainwashed and Crazy. Daolon Wong tried to do this, but ended up freeing Tarakudo instead, though he had briefly controlled them in an earlier episode.
All that world domination stuff just doesn't pay the rent.
Shendu and Valmont's henchmen. It consists of Finn, Ratso, Chow, and Hak Foo. Tohru starts as an Enforcer but he has a Heel Face Turn in the end of season 1, making Hak Foo replace him. Later, in season 3, they work for Daolon Wong and Tarakudo in season 4. But in season 5, when Drago employs them, he turns them down after they fail him once.
Too Dumb to Live: though they do have some smart moments, they have had at least a few of these moments, like when a spell gone wrong had made Jade as tall as an office building, they ran and attacked her, but she promptly steps on them (they were dark chi warriors at the time though, which may have been why they didn't think it through), Valmont saying he couldn't believe they didn't see that coming.
Drago's henchmen. It consists of Strikemaster Ice, DJ Fist and MC Cobra. Originally a pizza boy, Ice joined a monastery where he learned martial arts and met his boys Fist and Cobra. After they were kicked out of the monastery for bad behavior, the Ice Gang sought revenge but were stopped by Jackie and the Enforcers. They were later recruited by Drago and changed them into his dragon henchmen.
Genius Bruiser: Cobra and Fist managed to build a submarine out of broken cars in their junkyard hideout. It's possible that they built the monster trucks and tasers used to kidnap Jackie, Uncle, and Captain Black in the second to last episode.
Monkey King is a trickster monkey. He is released whenever someone pulls his puppet form's leg, the luckless victim becoming a puppet in his place, only to be restored if he pulls their leg, which he isn't likely to do of his own free will. He might seem like an irritating prankster at first glance, but he takes a very dim view of anyone trying to spoil his fun...