Well, in some stories, the guy could initially be a bit hesitant. But once he tries it, he might discover that it's not as strange as he thought. He could feel a bit self - conscious at first, but then start to explore how it works and what kind of sensations it can bring.
Well, Ruby would probably be all wide - eyed and enthusiastic. She'd be into the creativity of the fanfiction, seeing it as a new world of adventure for Samurai Jack. Weiss might nitpick a bit about grammar and plot holes, but still be somewhat interested. Blake would be more into the deeper themes, like the struggle between good and evil that is often prominent in Samurai Jack. And Yang would be like 'Yeah, Jack! Kick some butt!' throughout the more action - filled parts of the fanfiction.
For Doflamingo, you can focus on his flamboyant and unpredictable nature. Show his sadistic side in how he deals with enemies, but also explore his more vulnerable moments, like when his plans are thwarted. For Crocodile, emphasize his cool and calculating demeanor. Let his past failures fuel his actions in the fanfiction, like his determination to regain his lost status. Maybe show how Doflamingo's chaos sometimes clashes with Crocodile's order.
One character that would make for an interesting pairing with Doflamingo in a crossover fanfiction is Zoro. Zoro's strong sense of justice and his skills as a swordsman would clash with Doflamingo's devious ways. They could have epic sword battles, and Zoro might be the one to cut through Doflamingo's strings, both literally and metaphorically. Also, Nami could be paired with Doflamingo. Nami's intelligence and ability to manipulate situations for her own gain, although in a more positive way compared to Doflamingo, could lead to some really interesting interactions. She could try to outwit him in a game of wits.
I really like 'Doflamingo's Unseen Side'. It presents a different perspective on Doflamingo. It has a lot of action scenes and also explores his relationships with other characters in the One Piece universe in a unique way.
Kristoff might also save Elsa. He is used to the cold and has his reindeer Sven to help him. He would follow any leads to find Elsa. And with his knowledge of the icy terrains, he could track down Jack Frost's hideout and rescue Elsa.
Another plot could revolve around an OC who is a former victim of Doflamingo's cruel rule. This OC could be on a quest for revenge. They might start by gathering allies who were also affected by Doflamingo and then plan a elaborate scheme to take him down. Along the way, they could face many challenges and obstacles set by Doflamingo and his loyal followers.
Yes, there might be such a fanfiction out there. The world of fanfiction is vast and full of creative crossovers. Some writers like to mix different anime universes, so it's possible for someone to write a story where Naruto, from the Naruto universe, is a fan of Doflamingo from One Piece. However, it would be quite an interesting and unique take on both characters.