Maybe? I admit that I am looking for characters with more mass in their hair.

I don't know if there is a mass you looking for but I feel like to mention it because twintails are theme there. "Ore, Twintail ni Narimasu." Anime. It made me laugh many times.

For characters with more mass I can think of:
Naruto using "Sexy Technique".

https://naruto.fandom.com/wiki/Sexy_Technique

Sona from "League of Legends"

https://vignette.wikia.nocookie.net/leagueoflegends/images/4/41/Sona.Klasyczna.sk%C3%B3rka.jpg/revision/latest?cb=20140610182436&path-prefix=pl

I don't know how many will fit your taste but you may also want to check "Mega Twintails" on "tv tropes" for list of characters that may fit your requirements.

https://tvtropes.org/pmwiki/pmwiki....../MegaTwintails