Arashi and Furashi are the same guy, or at least related.After the Science Patrol and Ultraman finished off the first wave of Earth monsters, the Science Patrol was reformed into the Ultra Guard to deal with alien threats after the Zetton incident. Arashi quickly rose through the ranks and became part of the Japanese branch. His last name was changed perhaps due to a marriage, or other incident.
Chaos, a corrupting, mutagenic presence from who knows where, unrelenting, and will bring the doom of all sentient life if it wins? Hmmmmmm....