Archer from Fate/stay night... is not an archer. He has a bow that he can use, but he's primarily a swordsman. The same goes for Gilgamesh, the Archer from the previous Holy Grail War. Word of God has stated either could have gotten the title of Saber (in each Holy Grail War, there's the same set of seven titles the servants go by), but the Saber who is King Arthur fits it even better, and since they often used their swords as range weapons "Archer" was the next best fit.
This isn't entirely true since unlike Gilgamesh, who more or less uses his weapons in a More Dakka / Macross Missile Massacre role, Archer'snote EMIYA second most powerful ability after Unlimited Blade Works consists of creating fake Noble Phantasms with his Reinforcement and Projection abilities and then breaking and firing them from a Compound Bow created from an alloy only found in his original time, giving his role as an Archer a very good fit.
FSN Archer's personal combat philosophies are also quite close to the ideal of Kyūdō. Not to mention the attitude which inspired the Independent Action ability associated with the Archer class being a strong element of characterization in both of the above.
Assassin from the same series is not an assassin. He is a Samurai and he never use any dirty trick. Assassin is really a honorable and honest man who prefers one-to-one battles. There is a reason why a Servant named True Assassin appears in the Heaven's Feel route.
For those still wondering about it, The Other Wiki has an article on goldfish and most of them are effectively not golden.
The bit about blue lights is a reference to the Japanese language. The lowest light's color is often called "ao", which is an old Japanese word that refers to any color from blue to green. They now have specific terms for blue ("ao") and green ("midori") and a lot of shades in between, but "ao" still can be a number of colors. In this case, she's complaining about using the word "ao" when "midori" would be more accurate.
Osaka: Okay, so, you know how we write "dolphins" as "sea pig"? Sakaki: Uh-huh. Osaka: But we use the same character for "pig" in "river pig" and somehow it comes out as "puffer fish", but they live in the sea.
Suddenly the "ocean bacon" (meant to be a random word combo and Noodle's Berserk Button) in the Gorillaz book makes a lot more sense...
Osaka herself is an example; She doesn't really fit the Osakan stereotype, and isn't even originally from Osaka, but Tomo decided to give her the nickname, and it stuck.
The weapon names in Tokyo Mew Mew are usually at least straightforward puns, but the Mew Berry Rod is too small to be a rod and not intended to be used by Mew Berry. And what's the "tone" in Mew Mint's Mintonarrow supposed to mean?
And the StrawBellBell (or whatever) didn't even have a bell originally.
Naruto A rather blatant example: Kabutowari is a hammer and axe linked by a cable. It's referred to as the "bluntsword" and counts as one of the Seven Swords of the Ninja Swordsmen of the Mist.
There is a species of Digimon called "Flymon" even though they're really closer to bees. In fairness, they do, in fact, fly.
A Dub Name Change inflicts this on Anomalocarimon, renaming him into Scorpiomon despite the fact that he looks nothing like a scorpion beside the tail and clearly being based on some variety of prehistoric crustacean.
Transformers Armada: The Star Sabre has nothing to do with stars. The Skyboom Shield neither flies nor goes 'boom'. The Requiem Blaster is very loud when fired. Who named these things?
Also, the Cyber Planet Keys are not actually keys, nor does the Omega Lock lock anything.
Many such oddities make more sense from a toy collector's perspective. Cyber Keys, for instance, are roughly key-shaped and are used to unlock various gimmicks. As for the Omega Lock, once all four keys are in place and it's put into its proper place in a temple on Cybertron, it unlocksthe planet, allowing it to awaken and transform into the god Primus.
Some Transformers are named for features that later incarnations won't have. Armada Smokescreen doesn't have smoke (though he did once activate such a feature in the Autobots' base... something anyone could've done.) Energon Sixshot doesn't have anything to do with the number six (the original Sixshot had six forms, though the 'shot' is still a misnomer.) Cybertron Crosswise's name has nothing to do with him, though he is a 'monster hunter' and some monsters don't like crosses... but that's really stretching it. The first use of the name was with a guy in Transformers: Robots in Disguise who had a big X on his car hood. G1 Ramjet? An F-15, which doesn't use a ramjet. The list goes on and on.
Ramjet's name actually suits him pretty well, considering his penchant for ramming other aircraft out of the sky.
Justin Law of Soul Eater has an attack named "Law Abiding Silver Gun", which is not a gun but a guillotine blade . The name makes no sense except as a Shout-Out to B.Ichi, which had a weapon of the same which was a gun.
The Snipers in EL, who don't ever appear to do any actual sniping in the OVAs, and in fact mostly just use pistols while running around and doing ordinary police work. Though it's possible that The Serial Rapists, while more accurate, wouldn't have gone over as well with the public.
Tuxedo Mask of Sailor Moon technically does not actually wear a tuxedo; he wears white tie and tails, which is more formal. By definition, a tuxedo (or "dinner suit") has a black bow tie and a suit-style jacket rather than a tailcoat. And either way, it's not a mask. ("Tuxedo Mask" is a straight translation of "Tuxedo Kamen", owing to a long history of super-hero types with "blank"-kamen names.[[/note]] For the purposes of this series however, he is wearing a "tuxedo" and a "kamen/mask".
Sailor Pluto of Sailor Moon has an attack called "Dead Scream." While she does represent the planet named after the mythological King of the Dead, she initiates her attack by saying the phrase in a normal to low-volume voice.
Similarly, Sailor Saturn has an attack called "Silent Wall." Her planet is called the planet of silence, but she initiates her attack by screaming the phrase.
School Rumble is described by FUNimation as "The absolute funniest show you'll ever see that's not about anything that rumbles... ever!", although admittedly there is at least a school...
In Gundam AGE, the DOTS/DODS Rifle is an upgraded Beam Rifle which adds... rifling, meaning that "beam rifle" is a non-indicative name.
Starrk has the theme and appearance of a cowboy gunslinger. Despite his name being Coyote Starrk, his Animal Motif is the wolf. His background is that of a lone wolf who desperately wants to be part of the pack and his power, Los Lobos ("The Wolves"), allows him to split his souls into both companions and an entire pack of soul wolf weapons.
"Gerifalte" is Spanish for "gyrfalcon" but Patros's true form barely looks like one.
Jabalý supposedly means "boar". Aldegor's anything but boar-like.
Zaku Zaku Hour on SD Gundam Force, lasting barely five minutes per episode.
Less apparent in English, but the Japanese term for alchemy in Fullmetal Alchemist literally means "the art of gold transmutation", which is (almost) never done throughout the series, due to it being illegal to prevent economic chaos.
For those not familiar with Yatterman, you see that girl on the left in this image◊? Her name isn't Yatterwoman, nor is it Yattergirl. She's known as Yatterman-2. It could be reasoned that the "man" in this case is short for "human", but it's still somewhat confusing.
This is an issue that dates back to at least Science Ninja Team Gatchaman, another superhero team whose name ends in "man" but includes a woman.
Pirate crews in One Piece are often named after their captains, but more confusingly, sometimes named after a characteristic of the captain that not everyone in the crew shares. The main characters, the Straw Hat Pirates, are an example, as only Luffy, its captain, frequently wears a straw hat. Another example would be the Red-Haired Pirates, named after the captain's red hair (not everyone in the crew is a redhead). There are also pirate captains whose names are also normal words that can lead to incorrect assumptions about the crews, such as the Kid Pirates (not actually children, but run by Eustass Kid) and the Buggy Pirates (no relation to glitchiness or automobiles, but has Buggy the Clown as its leader).
Teekyuu! focuses on a tennis club (teekyuu meaning "tennis") that does everything except actually play tennis. At least one character lampshades this.
For a series called Kill la Kill, there is very little killing happening. There is a lot of murderous intent and a truckload of violence, but after a student is offed in the first episode's Cold Open, no more onscreen deaths occur until the next-to-last episode.
One of the characters in Fullmetal Alchemist is indeed an alchemist who is fully made of metal, but he's not the one the title refers to.