Site Gijinkas: Part V
There are a few others that are a bit more relevant than many of the others I have already listed, but either their creation was very different, or significantly more recent.
Brand New Member (BNM)

Somewhat similar in concept to green anon. KYM's default profile picture is a stand in for a random anonymous user. More often than not, specifically new members who had a habit of not adding their own profile pictures which left the default one up. As such, this is often associated with noobish behavior. I tried to give this the name of "BNM-San" to fit in with the naming conventions of the others, but I was probably the only one who ever did that lol.
This one kinda overlaps with the user sphere, but seeing as it's often used as a physical manifestation of the "concept" of brand new members, or occasionally the KYM user community as a whole (that is not admin/staff/moderators) and not one specific user, I think it is better here.
Click to see larger version on site. No, I have no idea who or what Mafia Boy is lol. Looks like a three eyed Pillsbury Doughboy [with a bad left eye]and a red neckerchief though.
Oh, and this piece by Samekichi is nice
As this one is the physical manifestation of Brand New Members, This one can exist in multiple forms depending on the context. Can be "one" individual that is a gijinka of all BNMs, or you can have many of them that represent a crowd of users. Some BNMs are "protoforms" of users who develop into contributing members. But most are essentially just exchangeable faceless masses who act noobish and never adapt, and are mocked for it.
KYM Collector Bot

Former name of the account that is now known as "Reddit Moments". Created by the admins (and profile pic done by Don), it was made to help collect a bunch of Reddit memes that would be missed otherwise. In the early days, users hated it because the massive amount of content it uploaded flooded out the content that real users uploaded. It also had a problem of duplicate uploaded (sometimes uploading a few dozen reddit posts five times in a row until it could be fixed). It also still applies tags that are completely useless, or more than useless because it could clog search results of something else. Technically speaking, this is a "user" but to me, the bot feels more appropriate to list here.
The physical robot is fairly small, around 30cm/ 1ft tall. May have had emotions at one point but if so, the bot terminated these after being abused by the regular users for "flooding" the site with images. Androgynous/genderless voice, though if robot was built this way or if this was an effect of deleting emotions is unknown. Tries to do assigned tasks, but has to be very explicitly taught how to do it on every little detail to get it right, and even then still messes up on occasion. Generally ignored/taken for granted and only gets attention when working improperly.
NSFW-Tan

Initially created in relation to Neo Cortex posting usurping wojaks and NSFW images in the new images feed. She is the personification of the NSFW tag. These images were removed by the creator from the site (somehow mods were able to find it again), and she really hasn't gotten much in terms of edits. FYI, the design alone is pushing it on what is allowed on the site, as body paint like appearance is mentioned in the rules as being generally unallowed. Only the fact that she's meta really let her stay tbh.
In her default mode, I see her being fairly large, due to NSFW having a heavy presence on the site (uh.. I realize that comes across more as a weight thing which wasn't the intent lol.) She would be tall, but closer to 6.5 – 7 feet, maybe 8 than building height. Still, default form would probably be taller than any of the site gijinkas and their associates, outside of Longcat and Tacgnol.
The drawing set had one sketch with BNM being very small compared to her, surprisingly detailed feet… (which I will NOT be posting lol). I'm sure it wasn't intentional, but seeing that and the fact that she is basically the physical embodiment of all NSFW images on the site, she should be a shape shifter. Could be 100 feet tall or only 1 inch tall for Macro/microphila. Could look like a giant balloon with a head for inflation. Could look like a young girl for [REDACTED]. You could even draw just her face for floor tile fetishism. Any depraved fetish (that won't get you banned from the site) she can recreate. (This by extension would mean she has access to a stupidly huge array of super powers. Growing/shrinking, shapeshifting, near invulnerability, hypnotisim, ability to change sex, etc. I bet there are hundreds of other fetishes I can't even think of that would require other superpowers to have any possibility of replicating in real life.
Her attitude and personality likewise changes radically depending on the fetish. Dommy mommy, chubby subby, and whatever else. Probably a bit embarrassed about being seen involved in the weirder fetishes (at least, weird by the general KYM community standards) though. It's probably less she doesn't like them than she does like them she just didn't want everyone to see her liking them, but whatever.
I think she would also get some sort of sick pleasure in fooling users when they were hoping for lewds behind a NSFW tag, but it was really gore/jumpscares/ other not inherently sexual content. Likely has has a sort of evil satisfied grin when that happens.
Spoiler-(San?)

Personification of the spoiler tag, I cannot recall what this one's name really was but I'm just gonna call him Spoiler Tag unless someone else remembers his real name. I think I recall another piece of media with this one, but likely faced the same fate as the previously mentioned one, but it couldn't be tracked down. This other one might have had the Spoiler Tag be female but I don't recall honestly.
Unlike NSFW-Tan, Spoiler Tag I see him being just average human size (yeah, I know the only image left is one with them as around the same size, but remember, my head canon is she can change that). Spoilers are comparativly infrequent, but there are times, at least in the past, after a new episode of something that was popular would flood the galleries. As such, I think this would be better represented with something like the ability to create shadow clones: make a bunch of copies that can appear and then disappear at will. Some of these could appear male and some female. Maybe these could take alternate forms that corresponded to what the spoiler was about. Like, ones associated with mlp would look like solid blue ponies with floating disembodied hooves over their eyes, ones from a specific anime would look a solid blue version of a character from the anime with floating disembodied hands, etc.
Not much personality, mostly just stoic and menacing. Very rarely if ever talks, and voice would be clear and emotionless. Have hammer space weapons (again, probably at least loosely associated with the thing that the spoiler is for) that look threatening you if you try to see the spoiler, but generally won't actually be used against you. Maybe also has the ability to spawn other disembodied floating hands that allow him to cover up the eyes of anyone he chooses, multiple at a time. However, that's the only thing these hands can really do.
Because they look so different than the rest (what with being solid colors and nude and all), I see them having super powers, and really don't show up elsewhere, I kind of see them as being in a sort of different "plane of existence". Super Robo Jesus is often seen as the head of the KYMtheon, but these two would be sort of lesser gods. Worshiped (well NSFW-Tan at least…) and able to do things that no mere mortal could, but also not all powerful. They are kinda an ever present "force" but very seldom "there in person" though they can do that too whenever they feel like it, just kind of showing up unannounced. NSFW-Tan, due to her larger default size would likely be slightly clumsy on "the mortal plane" (and I guess some people probably find it sexy I guess?), whereas Spoiler-Tag would be almost robotic and serious.
So, that was most of the site Gijinka. I am almost certain there are other that did not survive with any real evidence, or alternative versions that might have been superior to the ones shown… but had the misfortune of having the image service that hosted them taking them down. If anyone happens to know of some of the others, or better yet, saved pics of ones that aren't pictures here, that would be great, KYM-tan is by far the most popular, and is also the easiest to access. –Likewise, it's more difficult for my headcanons about her to become accepted as the true canon.–
I can do some on Monarchy of Cringe or the Photoshop pantheon, but this took a bit of time to compile. On the brightside, it does get quite a bit of this in one place.