Ares

Ares and Pebble come from a postapocalyptic universe, where a natural disaster happened that destroyed most of humanity and robots took over the planet. Humans who survived tried to fight back against the robots and get back in control, but to no avail. Most of them were captured and enslaved by the robots. The sisters witnessed their parents deaths when they were trying to protect them from the robots and right as the robots were about to get them a portal appeared, They didn't think and jumped through ending up in CBU's sea.
Pebble can't swim, so Ares had to carry her all the way to land.
When they got on land there were monsters attacking them.. Ares was exhausted and fainted so Pebble attempted to throw pebbles and rocks to defend themselves, screaming for help. Luckily the rangers came in time to rescue them.