Ruyo

Ruyo is the Het slash ship between Rudo and Riyo from Gachiakuta

CANON
Rudo and Riyo first meet inside a Jeep that was heading towards the Cleaner's HQ, Enjin questions Riyo on when she got inside the vehicle, Riyo answers by saying that she "wanted to see the new kid" which was Rudo, Riyo then asks Rudo if he was the newcomer, in which he says yes. Afterwards Riyo suddenly touches Rudo's hair and says that she's fascinated with it, even asking Rudo on whether its dyed or not (Rudo says its natural), while Riyo was playing with his hair, Rudo on the other hand was flabbergasted by the mere fact that a girl was playing with his hair so suddenly in their first interaction.

After finally arriving on the HQ, Riyo nonchalantly walks out of the jeep humming as Rudo steps out feeling stunned by the situation that just occurred, when Rudo and the cleaners meet up with their receptionist Semiu, Riyo says bye to Rudo, while Rudo in his mind questions if Riyo was "gonna rough him up again".

Later on when the Enjin and Rudo realize that the boss isn't around, Riyo makes a humble request to have Rudo do an observation on how the cleaners do their work, even coming close to Rudo's face and saying "I want to know you better Rudo, please?". When in they arrive on a polluted zone being invaded by Aberrant beasts, Rudo is shocked by how many strong enemies there are, to the point where he questions Riyo on how she can be so calm in a "life or death situation", Riyo happly replies by saying that to live on the ground, its important to have a calm mind, which when Rudo hears, he gains some bit of courage