Elios is immortal,sorta like Sailor Pluto because he has to guard the
earth,and beautiful dreams.Sure is alot of work!^_^. Also,from what
I've seen on the anime and read in the Mixx manga translations he mentions
being alive when the senshi were last alive during the silver
millenium so he has to be pretty old yet he looks young.From the
flasbacks on the last couple of Super S episodes you
can see that he was alive during the Silver
Millenium when Neherenia tried to get the crystal.