Yang from RWBY might interact with the female characters from other Rooster Teeth shows. Yang is strong - willed and confident, and she could share her combat experiences with them. At the same time, she could learn new ways of handling different situations from these characters. For example, if she meets a character who is more strategic and less about brute force, it could be an eye - opener for her.
Naruto and Ruby are very likely to interact. Ruby is the main character in RWBY, and Naruto being the central figure in his own story, their paths would surely cross. Ruby's enthusiasm for combat and her leadership qualities could make for an interesting dynamic with Naruto's determination and his own brand of leadership. Also, Weiss could interact with Naruto. Given Weiss's strict upbringing and her proficiency in combat, her reaction to Naruto's unorthodox ninja techniques would be fascinating.
They might start by reading them out of curiosity. Ruby, for instance, would probably be excited to see all the different versions of her story. She might share the interesting ones with her team.
Ruby could interact with the main characters from Red vs. Blue. Maybe she tries to teach them some of her scythe - fighting techniques, and in return, they show her some of their military - style combat strategies. It would be an interesting exchange of skills.
One idea could be a crossover where the RWBY characters are transported to a different Rooster Teeth universe and have to team up with the local heroes to defeat a common enemy. For example, they could end up in the world of 'Red vs Blue' and have to deal with the chaotic military situations there.
Probably Ash and Iron Man. Iron Man is always curious about new things and Ash with his Pokémon would be quite an interesting sight for him. He'd likely approach Ash first to ask questions about what he is and what those strange creatures are.
Spyro and Twilight Sparkle would be likely to interact. Twilight is very intelligent and well - versed in magic, and Spyro has his own dragon powers. They could learn from each other. For example, Twilight could study Spyro's dragon magic, and Spyro could learn about the complex magic system in Equestria from Twilight.
It could be Percy and Black Widow. Natasha is a master of reading people, and she'd notice Percy right away. She might approach him in a more stealthy way compared to the others, trying to assess if he's a threat or an ally. And Percy, being used to danger, would be on his guard at first, but then start to trust her as she shows her good intentions.
Definitely Ruby Rose and Master Chief. Ruby is the main character in RWBY, full of energy and determination. Master Chief is a well - known and iconic figure in Halo. Their different personalities and combat styles would create an interesting dynamic. Ruby's quick - thinking and agility could pair well with Master Chief's stoic and strategic approach in battles.
Naruto and Aang would be the most obvious ones. They are the main characters in their respective worlds.
Definitely Geo Stelar from Megaman Starforce and X from Megaman X. Geo has his own set of skills and X is iconic in his series. They would be the natural leaders to start interactions between the two groups.