Ranking System in this world.

Rank F: Lowest rank, the holder is described as a bit stronger then the average human.

Rank E: Most common one, where the holder is slightly more powerful then the peak F- Rankers.

Rank D: Peak of the lesser ranks, the holder holds great powers putting him at the lowest of the intermediate level.

Rank C: Peak of intermediate level. The holder of this ranks has great potential to become someone strong.

Rank B: Upper rank with a holder known for his great capacities and abilities.

Rank A: Halfway through Upper rank, it's holder cannot be defeated by anyone.

Rank S: Peak of Upper rank. The rank drawing a lot of envie with it's holders being known as the strongest.

Rank SS: Powerful rank only a few have the potential to grow this strong.

Rank SSS: Extremely powerful rank impossible to reach by a simple mortal, only Heros and Arch Demons can stand on this height.

Rank X: Only the universe's calamities can ever get close to reaching this rank.

Rank ∆: a rank reached by very few if not no one due to it's unreachable heights . Only a few gods and supreme deities can ever hope of being close to achieving this rank.

Ultimate Rank: The empty class unfilled nor touched for countless years.