Gildarts could be a dark horse. His magic is extremely powerful and his experience in the magical world is second to none. Although he might seem laid - back, when it comes to a competition like the Triwizard Tournament, he could pull out all the stops and surprise everyone with his skills and strategic use of magic.
Erza would also be a strong contender. With her vast array of armors and combat skills, she can adapt to different situations easily. Whether it's a task that requires brute force or some strategic thinking, Erza can handle it. She has the discipline and experience to outperform many opponents.
Natsu. He's got incredible power and determination. His ability to eat fire and use dragon - slayer magic gives him an edge. He's not afraid to take risks and he's always ready for a fight, which would be very useful in the various tasks of the tournament.
Natsu would be a strong contender. His dragon slayer magic gives him great strength and endurance, and his determination to win would be unwavering.
Ruby is a likely winner. She has her powerful scythe, great speed, and strong leadership skills. Her ability to quickly analyze a situation in battle gives her an edge. Weiss also has a good chance. With her Glyphs and powerful summoning abilities, she can control the battlefield. Blake is another one. Her speed and shadow - cloning ability make her a tough opponent. And Yang with her super strength and ability to take a hit and then counterattack fiercely could also be a top contender.
Gray is another candidate. Gray's cool and collected demeanor could contrast with Tobi's more mysterious nature. They could get into arguments about the best way to handle a situation, like when facing a powerful enemy. Or, they could find common ground in their skills and work together to protect Fairy Tail from danger.
Hermione Granger is often a popular character. Her intelligence and love for learning make her a natural fit for the academic aspect of the Triwizard Tournament. She can be portrayed as using her vast knowledge of magic to outwit her opponents in the various tasks.
Makarov could be a great teacher. He has a wealth of knowledge and experience in magic. He could teach advanced magic techniques and also lessons about leadership and guild values. He would be strict but also very understanding and always ready to give good advice to the students.
Natsu from Fairy Tail and Maka from Soul Eater. Natsu is a hot - headed and powerful mage, always eager for a fight. Maka, on the other hand, is a determined Meister with a strong sense of justice. Their common goal of defeating powerful enemies would likely bring them together. Natsu's brute strength and Maka's strategic thinking could make for a great combination in battles.
Sonic and Natsu would be likely to interact first. Natsu is always eager for a challenge and when he sees Sonic's speed, he would be intrigued and want to test himself against Sonic.
Natsu would be a likely candidate. He's always up for a challenge and not afraid to take on powerful opponents. He'd probably be the first to rush towards Godzilla, either to fight it or try to befriend it in his own Natsu - like way.
Natsu would be a likely candidate. He's always eager for a fight and his reactions to the intense battles in Death Battle would be interesting.
Another character that might be featured is Jellal. His past and his powerful magic make him an interesting character for death battles. He could be pitted against both Fairy Tail characters and characters from other series in the fanfiction. Plus, characters like Mirajane in her Satan Soul form also have a high chance of being included due to their unique powers and abilities.