Board Thread:General Discussion/@comment-4698889-20170224092621/@comment-6986530-20170308213322

Yes, Gallerian is noted as sharing his ancestors' habit of looking much younger than he actually is, which is attributed to several different factors. It's not a stretch Nemesis inherited it, even without Ma in the picture. But when it comes to the hair I think ichika is going more for recognizability than arbitrarily changing up the style to show the passage of time.