Who's paragonsky?

Was this paragonsky character ever mentioned in the campaign?

I’m confused about the halo universe’s officer rankign system.
Who is ranked higher? Hood or this paragosky?

Is hood part of ONI too?

Margaret Orlenda Parangosky is a (full) Admiral in the UNSC and as of 2553 (The Thursday War) is the Commander-in-Chief of the Office of Naval Intelligence, the UNSC military intelligence division.
Fleet Admiral (Lord) Terrence Hood is Chief of Naval Operations. He acted as the leader of humanity during the Human-Covenant War.
Although Lord Hood’s rank is technically higher than Parangosky’s, her position as the head of ONI grants her power of a different sort.