The realm of Japanese anime is famous for its incredible, rich diversity in storylines, narrative themes, and certainly character designs. Any anime fan can find a few fictional characters to identify with and cheer for, from powerhouse himbos like Son Goku to emotionally rich heroines like Tohru Honda and antihero badasses like Guts the mercenary. Every anime fan has their own type, such as bad-girl waifus or sensitive boys, but one group everyone seems to love is shy characters, or danderes.
Source：https://www.cbr.com/why-shy-anime-characters-are-so-popular/
