Back to the original prompt, there's a couple Ys character who'd be cool aside from Adol. The first is Geis a recurring character who debuted in Ys VI.
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Swings around a big halberd. Uses sealing talismans, can place traps, and commands three alchemically-created fairies (Long story), the latter of which could be used to replicate the three elemental weapons of Ys VI to some degree.
The other guy is Hummel, from Ys VIII
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He has a gun in a somewhat fantastical fantasy world, which is already really %$#@ing funny on it's own. He's a "transporter;" A guy who's paid to deliver stuff to you. He works in the darker corners of
society, and while he does aim to do good, he's basically a smuggler. He also has a strict code of honor that he follows, and he
will deliver whatever the %$#@ he's tasked with provided he gets payment. And again,
he has a musket rifle in a medieval JRPG, which would be both unique and hilarious in the context of Smash.