Nora. She has a very energetic and wild personality. She might start a food fight just for the fun of it, especially if there's some delicious food around. Maybe she sees a big stack of pancakes and decides it would be hilarious to start a pancake - throwing battle.
Ruby. She's impulsive and has a love for food, especially cookies. It's easy to imagine her getting excited about a food fight and accidentally starting one by playfully throwing a cookie at Weiss or someone else, which then escalates into a full - on food fight.
Nora could also be a likely candidate. She's very energetic and not one to be intimidated easily. When she sees Goku's amazing power, she would probably be excited and want to team up with him right away. She would be constantly asking Goku about his world and his powers, and they would bond over their love for combat and having a good time.
Yang and Tucker could also work well together. Yang is strong and confident, while Tucker has his own brand of bravado. They could get into all sorts of adventures and battles, with Yang using her brawler style and Tucker with his sword and unique abilities. Maybe they'd compete for who can take down the most enemies in a fight.
Well, it could be a team effort actually. Ruby could handle the more action - oriented flying parts, Weiss could manage the navigation and communication systems, Blake could keep an eye out for any threats using her stealthy skills, and Yang could be in charge of the power systems and any emergency repairs. This way, all of their skills are combined to effectively pilot the space shuttle in the RWBY fanfic.
The members of Team JNPR could also be likely survivors. Jaune has grown a lot in his skills. His leadership and swordsmanship could be useful. Pyrrha, if she were still alive in this fanfic scenario, would be a great asset with her combat abilities. Ren's calm and collected nature, along with his stealth and combat skills, would help him survive. And Nora, as mentioned before, would be a great addition to the group of survivors. They could work together with Team RWBY to face the zombie apocalypse.
Ruby. She's extremely fast and has shown great combat skills. Her ability to quickly move in and out of danger would give her an edge against a Xenomorph. Also, she has a strong sense of determination which would help her stay focused during such a terrifying encounter.
Zero and Ruby would be a likely pairing. Zero is a powerful and skilled fighter, and Ruby has a lot of potential and a unique weapon. They could learn from each other's combat styles. Ruby could learn about Zero's more serious and battle - hardened approach, while Zero could be inspired by Ruby's enthusiasm and creativity in fighting.
I think Ruby and a young, adventurous Pilot would make a great pairing. Ruby's enthusiasm and eagerness to learn new things would mesh well with a Pilot's daredevil nature. They could exchange stories about their respective worlds while fighting side by side.
Hawkeye might be one. He's always on high alert and if he senses any threat from Team Red, he could be the first to draw his bow. He's very protective of his team and the world, so any sign of trouble from a new group could set him off.
Ruby would be a likely candidate. She's already known for her speed and agility in combat. If she were to be affected by the Speed Force, it would enhance her existing abilities to a whole new level. She could move so fast that she becomes almost invisible to her enemies, and her scythe attacks would be even more deadly with the added momentum.
Toad and Blake could form an alliance. Toad is small but mighty, and Blake is stealthy. They could work together in reconnaissance missions. Toad could use his speed to quickly gather information, and Blake could use her cat - like senses and stealth to move around undetected and protect Toad if they are discovered.