1. 10 Equinox flower after opening in the lethe river.

2. They were siblings to Lethe, Limos, Horkos, and Ponos. Algos in Greek is a neuter noun literally meaning "pain"

3. The Acheron is based on the river of the same name from Greek mythology, and the river Styx from the Disney film Hercules.It also shares aspects with the rivers Lethe and Styx from Greek mythology.