After the punishment of Telphusa for her deceit in giving him no warning of the dragoness at Pytho, Apollo, in the form of a dolphin, brings certain Cretan shipmen to Delphi to be his priests; and the hymn ends with a charge to these men to behave orderly and righteously.
A dynamic character is a character who changes throughout the course of a story as a result of the conflicts they encounter on their journey. Some dynamic characters learn a lesson, like Harry Potter did in Harry Potter and the Chamber of Secrets.
If a character inherits a million dollars from a rich aunt in the course of a story, this may or may not result in the sort of change in his personality or values or in his general outlook on life that would make him count as an instance of dynamic character in this special sense.