The wise old man. Maestro's hair is white and so long that it completely covers his body, and only his facial features, arms, and feet are ever visible; he is also distinguished by two hairs on the top of his head that look like antennae. Maestro often keeps objects in his beard and is sometimes seen fiddling around in it to find the one he wishes to present. He also serves as a mentor to the children of the series. (Wikipedia)

Once Upon a Time... Space differs from the rest of the Once Upon a Time titles in the sense that the series revolve on a dramatic content rather than an educational premise. The series still has a handful of educational information (such as an episode discussing the rings of Planet Saturn). 
The series succeeds Once Upon a Time... Man. It reprises almost the entire totality of the characters of the previous series and adapts them into a science-fiction context. 
The story tells about the confrontation of many big galactic powers. Among them there is the Omega Confederation, of which Earth is a member of; the military republic of Cassiop&eacute;e led by the general Le Teigneux; and a powerful supercomputer which controls an army of robots. Once Upon a Time... Space features the adventures of Pierrot (son of colonel Pierre and president Pierrette) and his friend Psi.

He was a French actor and voice talent, known for his recurring film roles as Asterix, the French voice of Star Wars' C-3PO, and the French voice of Winnie-the-Pooh, Piglet, and Rabbit in Winnie the Pooh. He has also dubbed David Suchet as Hercule Poirot in Agatha Christie's Poirot. He also voiced Wally Gator, Mickey Mouse, Yogi Bear, Kermit the Frog, Heathcliff, Foghorn Leghorn, ALF and many other famous characters in French. (wikipedia)

A Japanese actor, seiyuu, and narrator. During his life, Tomiyama was affiliated with Aoni Production and Production Baobab. He died of pancreatic cancer.

Father of voice actor [Lorenzo Scattorin](https://anilist.co/staff/96239).

The series "Once Upon a Time... Life" teaches about the human body and about the different systems in it with the same characters from the other "Once Upon a Time" seasons. "The good Characters" represent the body's defense mechanisms, whereas "the bad Characters" represent the viruses and bacteria that threaten to attack the human body. 
(Source: Wikipedia)