Elsie Koopa

The third eldest of the koopalings. Kooky considers himself an artist; not only a master mechanic and chemist, but his background in painting and drawing come in handy when visualizing his bizarre ideas as well. He's got a certain style to his work that's uniquely 'him', keen on making his creations as visually awe-inspiring as they are deadly.

His ability to make use of wherever's on hand makes him, invaluably, the most resourceful of the koopalings. Kooky is constantly trying to outdo himself, throwing himself from one project to the next with reckless abandon whilst entirely neglectful of his wellbeing amidst his chaotic pursuits; much to his father's chagrin. He's the definition of not knowing when to quit, determined to succeed at any cost.

Despite his obvious lunacy, Kooky speaks with such passion and enthusiasm that he easily convinces his siblings his schemes are so crazy they just might work. He’s very secretive about his works in progress, not one to reveal anything until they’ve come to fruition.

He's not known for his temper, but if he feels he's been personally outsmarted or his intelligence has been put into question, he can fly off the handle. He'll bounce back from the failure of a collaborative family scheme with humor and an unshakable determination to try again. The failure of his own curated plots, however, leave him enraged and devastated to the point of sickness.

He's the wildcard of the koopalings, his unpredictable and volatile nature making him Mario and Co.'s most dreaded foe next to King Koopa himself.

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Other tidbits I either cut from his description or just wrote down for reference:

•He resents any titles or nicknames spread around by the mushroom kingdom that elude to his "supposed" madness, finding them to indicate he doesn't know what he's doing. "Kooky" only means eccentric and unordinary, of course.

•He has a vague prejudice against relying on magic, believing there's nothing magic can do better than he alone can figure out.

•He supports King Koopa's plan of conquering the lands and ruling them as a clan, though he can't help but fantasize about creating a doomsday device capable of wiping out the entire world. He wouldn't do it, though. Nah.

•He's the only one out of the koopalings who won't go out of his way to antagonize or instigate fights with the others. He's not very emotionally intelligent, but his siblings can be sure he'll never try to belittle or undermine them. He WILL stand his ground when challenged, however, and is definitely no pushover.