What if Cinos have visited the RWBY universe during his 2nd visit  (during Volume 5) as he freed the faunus Trifa from incarceration. 

Cinos came to to world by accident as he accidentally had a scrabble with many students of Beacon, most Team RWBY and Team JNPR along with Sun and Neptune as Cinos also easily slaughter many Grimms with total ease as he hang with Ruby, even though she and other don't. When Cinos returned to this universe, it have actually been one years while it been less than a month in his but learned many things change as RWBY seem to be temporarily to be disbanded as replace by RNJR, Pyrrha is dead, Beacon have fallen, Ozpin is in and share the body with Oscar, etc. Cinos run around in Mistral but go farther as he can smell Blake & Sun as he quickly head their location as he attack many Faunus who are part of the White Fang. Cinos meet up with the two but meet and instant fell for the spider faunus Trifa but also the bat faunus Yuma but Blake and Sun took care of them. After hearing that Adam led the White Fang where Ruby is, Cinos head out while the other took a ship, he wishes to see Trifa again but didn't know that she was arrested along with other White Fangs. After the whole Haven Incident with Adam, Cinos have successfully found Trifa and break her out of incarceration as he convince her to join him as where he from their not that much prejudice as she agree. Later, Cinos and Trifa would have a daughter named Arakna who developed a huge hatred towards human (except for Maria).