I have way too many to keep count of, so I'll try to be less wordy as I can be. Before the Seven Deadly Sounds' current association with the seven deadly sins, most of them were based on rather typical themes:
Miu was originally going to be an alien obsessed with potato chips, but his original design looked too bland, I ended making him a test tube baby incapable of expressing emotions.
Kael was supposed to be based off of a Beijing opera singer (more specifically a dan) and had a design similar to said performers, but because my sister criticized the design and his intended personality (he was originally going to be more aggressive than he is), Kael's new look was more based off of a martial artist. More specifically, his current design was inspired by Yun Lee from Street Fighter.
Watebayu only came to exist because my sister wanted me to make an UTAU based off my natural voice. Design-wise, he's supposed to be my interpretation of a young boy possessing stereotypical moé traits but later mixed in with Victorian/kodona fashion and a dom. I will guiltily admit that his eyepatch was inspired by Ciel Phantomhive from Black Butler, even though I never even watched the series!
Okashi was also born out of sheer randomness and solely revolved around the sweet kodona theme or sweets in general, thus the blatant pun of his name; he specifically leaned towards mint and its derivative confectioneries. His later designs were more based off of candy-themed Halloween costumes from
Chasing Fireflies.
χ is the
the embodiment of childish edginess! Just kidding! χ's actually the embodiment of my hatred, which is why he's a "dedicated" misanthrope. His wardrobe is generally black, beige, and mauve casual clothes that the "cool" kids usually wear.
While Kael resembles the Eastern opera singer, Anon fits the mold of the Western opera singer. His red and black color scheme and affiliation with masks is loosely inspired by Edgar Allen Poe's The Masque of Red Death, along with his interest in horror literature and grim backstory.
Shi (or Shian) was simply born from my envy towards my sister and her UTAU's recognition in the UTAU community, which is shown through Shi's statistics and hatred towards women. He also more or less represents my interpretation of a character poorly treated by his own "parents" or "parent figures".
Rei was mostly made to fill the gap of the eighth deadly sin (which could be interpreted in several ways). Theme-wise, he's supposed to be based off a dress-up doll, shown through his many costumes, habit of wearing women's lingerie, and unemotional gaze. His current look is inspired by traditional tango dancers, since he's Argentinan. Rei's color scheme comes from his last name: Ginga (Silver River or Milky Way).
All sixteen A.R.C.O.I.R.I.S. units are inspired by real-life cosplayers, the solfege, and the Seven Chakras. The latter are shown by their names.
The XOTAloids are obviously intended to be shotas, being misunderstood and deliberately drawn childlike and wearing shorts. However, each one of them has his own origins:
Since Q.P. was originally going to be the sole XOTAloid, he possesses the most traits that defines him as a dedicated shonen such as his mannerisms and wardrobe. His shy and sensitive personality is inspired by all how shotas are poorly perceived and treated by other people. Q.P.'s overall designs were inspired from gentle or misunderstood characters such as Jun Kazama from Tekken and Lapis Lazuli from Steven Universe to iconic shonen characters such as Cuilan from Senko no Ronde. Q.P.'s name comes from "kewpie", which is a type of doll and short form of Cupid.
O.G. is supposed to a shonen who excels at self-defense and his aversion towards yaoi and bouncing body parts are based on the fact that there are little to no young boy fighters in fighting games due to being overshadowed by their older male and female counterparts. His outfit is inspired by Alice Tsukagami's nurse outfit from Bloody Roar, while his hair extensions come from Leona Heidern's alternate outfit from King of Fighters Maximum Impact. O.G.'s name comes from "ouji", which means "prince".
D.T.'s futuristic theme is derived from android and robot child characters and his disdain towards neotenic females and gender roles comes from the fact females, mostly young and teenage girls, get to be created and portrayed in any way without being flamed, while boy characters are either shunned or bashed on for "not meeting the traditional male standards". His makeup kit and arsenal of makeup weapons is inspired by Totally Spies, while his character item is based off of
this. D.T.'s name comes from "doutei", which means "cherry boy/male virgin".
Well, that pretty much sums it up. I hope people aren't too bored or appalled by my personal thoughts.