Oliver

Oliver is a fourteen-year-old Octoling from the same dimension Blash, or Scarlet, is from, where humanity has been wiped out by a giant flood. He accidentally came to the dimension with which Scarlet currently resides, and now is stuck there, unable to go home.

Personality
Shy

Oliver appears to be rather shy and awkward.

Nervous

The Octoling is rather nervous and anxious.

Scarlet Blossom
This younger Octoling seems to look up and highly respect the older, seeing her as something similar to an idol.

Ally Anderson
Ally was the first person he met in the new dimension, and they hit it off well, Oliver quickly developing feelings for the slightly younger twin.