Complex sentence: Hotaru is a general from the realm of Seido, or Orderrealm, and devotes himself to preserving law and order at any cost, so much so that he could be described as a zealot.
Split into simpler sentences: Hotaru is a general from the realm of Seido, or Orderrealm, and devotes himself to preserving law and order at any cost. So much so that he could be described as a zealot.