It's also a popular way of showing happiness. Often anime characters will close their eyes when they smile. You might also notice that in some cases it's used to imply that a character is of an Asian country other than Japanese.
CardCaptor Sakura's Takashi Yamazaki is another one. I loved his weird stories, especially when Eriol Hiiragizawa joined in. You're right that the closed eyes give these characters a sort of affable charm.
Well in some cases where characters go about with their eyes closed its to give off the impression that the character is deceptive, cunning and sly.
Getting back to anime, the ‘big eyes, small mouth, etc” is how they portray ‘conventionally attractive female’ in anime (and as noted, most female anime characters are portrayed as at least somewhat attractive).
These characters may be prone to comic obliviousness, but outright stupidity is rare. Finally, closed eyes are sometimes used to depict people who are down and out with their lives as a sign of depression.
A character undergoing emotional stress may be shown from a head-on view or directly from the side with their head bowed and their eyes covered by their bangs or forelocks. (Sometimes the shot starts from one angle and cuts midway to the other.)
It's coding for him being Korean, rather than Japanese. Because he's got X-Men style hyperbeam eyes. That he's actually blind. Because his tiny pupils are sensitive to light.
Gojo needs to cover his eyes because using them would tire him out too quickly. He's got something called Six Eyes, which has been passed down in his family's bloodline. This is a rare type of ocular jujutsu.
1 Charon Has A Blindfold On (Fire Force) He has yet to be seen without it. Charon can evidently see just fine with his eyes hidden, and his combat style is based on absorbing the enemy's heat and using it himself.
He's a simp beyond compare, forming heart eyes and falling head over heels for the likes of Nurse Joy and Officer Jenny multiple times throughout the original series.
He's Japanese. And very tan. How do I know? There had been some debate between members of the fanbase in regards to why Brock was removed from the main cast during the Orange Islands arc, why Tracey Sketchit was created, and why Brock returned later.
15-year-oldBrock is a 15-year-old Pokémon Doctor in training, the former Pewter City Gym Leader and the ladies' man. In his earliest appearances, Brock has dreams of being the world's best Pokémon Breeder but later changed his dream to become a Pokémon Doctor.
Ash Ketchum's friend, Brock, is known for several things: his Rock-type Pokémon team, his fondness for attractive women, his big-brother personality, his cheap jokes (at least in the dub), and most of all, how he simply never opens his eyes. Ever since the late 1990s, he's kept them shut.
Lucoa actually does open her eyes once in a while, but for the most part, she keeps them closed, hiding just how remarkable those eyes of hers really are. Lucoa's eyes are mismatched, and they have intense, highly detailed colors that some people may find dazzling, even captivating.
Shino is a side character in the Kannagi: Crazy Shrine Maiden series, though she certainly is distinct for always having her eyes closed. Not even her eye color is known. And despite having her eyes shut at all times, she is an observant person and likes to take note of what her fellow art club members are like.
Serpico first appeared during the Conviction arc of the original Berserk manga series, and he also appeared in the 2016-17 anime adaptation of the series. He was first seen with the Holy Iron Chain Knights together with his half-sister Farnese, and he usually kept his eyes closed during his duty.
Captain Gin Ichimaru of squad 3 is widely mistrusted, since he is a mysterious fellow who never shows his true emotions or intentions. His face is always set in the same expression, including his permanent smug grin and his closed eyes. Thus, he is absolutely unreadable, and that makes everyone uneasy.
One of the four archangels is the powerhouse Ludociel, who has taken it upon himself to slay all demons by his own hand when necessary. Although he doesn't open his eyes, he can see his demonic enemies just fine, and they all soon learn to fear him.
During the Stardust Crusaders story arc, Jotaro Kujo and his allies arrived in Egypt, only for a deadly Stand user to attack them in the Saharan dunes. N'Doul, the blind Stand user, relied mainly on sound to track and attack Jotaro and the members of the Speedwagon Foundation, and it was scarily effective.