Lee is Kikuchiyo's counterpart, not Chico.
- Both are somewhat mysterious
- Both have done something, or do something that they regret and are in or go through a Heroic BSoD during the film, Lee making so many enemies that he can barely show his face, while Kikuchiyo's jealousy of Kyuzo leads to abandoning his contingent of farmers, leading to Yohei's and Gorobei's deaths. Both suffer a Redemption Equals Death in the Final Battle whilst rescuing a group of farmers held up by bandits in a farmhouse.
- Lee and Kikuchiyo are polar opposites in personality with different motives, so that only makes them similar.
- Alternatively, Kikuchiyo is a Decomposite Character, and has not one counterpart, but four. His closest counterpart is Chico, who tries to prove himself as a fighter, makes a drunken spectacle of himself, tracks the rest of the Seven, reminds them who they're fighting for and infiltrates the enemy camp. Lee is one because of the similarities mentioned above. Vin is rough, rowdy and womanizes the way Kikuchiyo does. And O'Reilly, who is mostly Heihachi's counterpart as well, develops a close relationship with the village children.
Tuco from The Good, the Bad and the Ugly goes on to become Calvera.
Think about it. At the end of the movie Tuco is left with a fortune, but no way to easily get it out, and no change in his character. He could maybe get away with one bag of gold but probably no more. So he either hides the rest to come back for or loses it. In the first case perhaps he finds a group of bandits who he manages to intimidate into not robbing him. He then enlists their help in exchange for some gold. Ultimately if this was a large group it would be almost pointless splitting it among them and he might not be able to double cross them. If this were the case Tuco would be better off using the gold to help make himself their leader. He then goes south of the border and renames himself to avoid the U.S. army (and maybe Blondie). The cost of maintaining a small army then bleeds away his fortune. If he loses most of the gold before he assembles his crew he still has enough to hire on some help. Then with some successful jobs he could gather the army seen in The Magnificent Seven. It's worth noting that the 2016 remake of The Magnificent Seven is set in the 1870's and the The Good, the Bad and the Ugly is set in 1862 so the original could take place after the events of The Good, the Bad and the Ugly.