Hololive Gen 0
5.5", uncircumcised. Average thickness, with a neat patch of trimmed pubic hair, Sora's penis is picture perfect. Sora's got smooth, white skin, with the foreskin pulled back over a delicate pink head. Despite not being the biggest, thickest, or superlative in any category, there's something perfect in the simplicity and proportion.
Roboco has a wide range of options to choose from, and typically, has a 6", ribbed purple penis attached. She likes to keep it attached even when she isn't using it, and laughs when people notice it. She has larger models, but only takes them out for special occasions. If she's losing at Apex, she'll often take a break to rub one out quickly.
3.5", uncircumcised. Miko's got a tiny, phimotic little dick, barely big enough to be called a dick. Even when she gets hard, she can't peel the skin back, and it's honestly hard to tell if she's hard. She stays clean shaven because she hard that shaving makes you look bigger. She rages when it gets called small, but makes no effort to hide it from the viewers.
7.5", circumcised. Suisei's dick is long, and a bit on the thin side, but gets very hard, with bulging blue veins visible through pale, delicate white skin. She's obviously proud of it, and has custom scrotal lingerie made to match the rest of her underwear. She's a shower, not a grower, and is almost always at her full length. She likes to slip it out of her panties and see how long it takes someone to notice the head of her cock dangling just below the hem of her skirt.
Hololive Gen 1:
7", uncircumcised. Long and thick, Mel loves to catch people looking at her, first glancing at her breasts, then at her bulge, then back up. She loves seeing how flustered she can make people, and deliberately wears small, tight panties because of it. She might not be the biggest in Hololive, but the contrast between her slim frame and impressive member make it seem very imposing.
4.5" long, uncircumcised. Matsuri's below average, but loves to mischievously sneak her dick out when no one's looking. She especially loves peeing in public. She usually shaves, but not often, so there's often a lot of stubble. She's got a lot of foreskin, and enjoys playing with it.
5", circumcised. What Aki lacks in length, she makes up for by having an exceptionally hard, thick member. Aki's special futa belly dancing is not to be missed. She can wiggle her dick hypnotically, and because she's half elf, she can stay hard for much longer than average.
8", uncircumcised. Amazingly, Haachama's dick might even be wider than it is long. Unbelievably girthy and hairy, Haachama's philosophy is that "smelly dick is best." She loves to torment her Haatons by doing ASMR streams where she slaps her mighty meat against her desk, and asking them what they think it is. She doesn't get hard often, but even soft, she's thicker and longer than most. When she does get hard, watch out, because you're cumming on the ride.
Hololive Gen 2:
4", uncircumcised. Aqua's got a small, skinny penis with a bright purple head, tightly covered by dark forsekin. Her foreskin is leathery and peels back almost in layers. She thinks her penis is on the average to big size, and no one has the heart to tell her otherwise. She hates that Shion calls her small.
3.5", circumcised. Though her dick's small, hairless, and thin, Shion uses her magic and potions to make it appear twice its size. She often does this illusion to taunt Aqua, despite actually being a little smaller than her. In truth, Shion actually really enjoys SPH play.
6.5", uncircumcised. Surprisingly large, Ayame's penis starts thick, and tapers to a thin point, with a fierce upward curve. Though she doesn't show it off much, her fans are always eagerly awaiting another glimpse of a truly royal cock. Her pubes are kept in a neat, tightly cropped bush of soft, snow-white hair.
8.5", circumcised. Very long and of average thickness, Choco is famous for her autofellatio ASMR streams. Around the office, Choco doesn't wear panties, letting her long dong dangle. She enjoys watching people fumble over their words while they try to stop staring at the bright pink head peeking out from under her skirt. After being scolded by management, she started wearing a lacy cock sock, on the grounds that she was technically fully clothed.
5.5", uncircumcised. Subaru's dick is of average length, above average thickness, and has a nearly 90 degree twist to it, corkscrewing to the left. She's got an especially large head that her foreskin can't cover. She's a quick shot, but is ready to go again quickly. She's often policing the other girls to keep covered, and won't hesitate to handcuff any offenders by the dick.