His mother is Alicia Freecs. She was a hunter and she died while exploring the dark continent. She and Ging met shortly after Ging became a hunter. They headed on many wonderful adventures together.
Furthermore, the ammonium ion acts as a weak acid in aqueous solutions because it breaks down in water to form ammonia and a hydrogen ion. Hence, although ammonia is mostly considered a weak base, it can also act as a weak acid in aqueous solutions.
Koutarou Amon (亜門 鋼太朗, Amon Kōtarō) is a former First Class Ghoul Investigator. He was Kureo Mado's last partner and his last partner was Akira Mado. He was subsequently declared dead by the CCG, though his body was never recovered, and was posthumously promoted to Special Class for his distinguished service.
In the U.S., this is a B+, good, solid grade above average. There is room for improvement, but it is solidly good. If your overall average is an 88, you will probably graduate with honors, or very nearly so.