Actions speak louder than words, buddy. Trying to use the names to figure it out doesn't even make sense, because the ONLY one with a NAME clearly corresponding to one of the Shining Stars is Wizard, anyway.

As far as actions go: Killer is clearly a tech-expert and hacker. He analyzed the Edens Zero's and its crew's abilities. Furthermore, when Brigandine pointed out that Valkyrie is missing, it was Killer who then said "Valkyrie's death confirmed." Here's the thing: HOW DID HE KNOW THAT? Her being MISSING doesn't automatically imply she's DEAD. The ONLY way he could've known that is if he hacked the Edens Zero's memory-files/log to figure out why she was missing, and thus discovered the record of how the crew found her dead. Therefore Killer is the hacker (Hermit-equivalent).

Wizard is clearly the Witch-equivalent since he's the only one whose name DOES correspond, and because he's able to convert his Ether power into elemental abilities like electricity which is exactly what Witch does. I'm basing the idea of Clown being the Sister-equivalent on two things: First, he has a flirtatious demeanor (so he must be "the lewd one" like Sister), and second, he looks like less of a fighter than Brigandine. Finally, Brigandine looks the most like a warrior out of any of them, and is the LARGEST: Remember that Valkyrie was the largest/tallest of the Shining Stars. Also, Brigandine carries a gigantic battle-axe, so him being the most combat-focused of the four is pretty obvious.