I already pointed out that this was wrong earlier in this thread.
From the thread on /u/, thank based Kawaii anon:
Alright, for those who cared to know Amano's thoughts on the characters, here's the whole list:
Ruki = Pride
First name: Lucifer (Luci). Last name: lion.
"When I think of how many times she got her pride crushed, she ended up becoming quite the wimp in the end. Her hair style resembles a lion’s mane."
Sachi = Wrath
First name: Satan (Sacchan -> Satan)
Last name: Wolf
"When I think of wrath, punishing people by punching them always comes to my mind so I made her a violent character.
The ends of her hair are pointy, making her resemble a wolf slightly."
Fueko = Sloth
First name: Belphegor. Last name: bear
"I thought of her as a hibernating bear. Because she is lazy, she keeps her hair styled as a bob so she can style and trim it at home without the hassle of going to a hairdresser."
Asuna = Lust
First name: Asmodeus. Last name: goat.
"It seems like Yagi-san’s letter never reaches its recipient (vol 2). I thought of making her pupils more wide and rectangular like a goat, but it looked really disgusting so I dropped the idea. I feel that girls with monolids look cute too."
Maasa = Greed
First name: Mammon. Last name: fox.
"At first, I had initially created a scenario where she racked up a huge gambling debt, and saved herself borrowing her parents’ money. I think handsome, rich girls with talent are simply the best. She’s actually the youngest one in the group."
So, Maasa is probably her favorite.
Meru = Gluttony
First name: Beelzebub. Last name: pig.
"When I first tried to design her character, it resulted in an empty, broken girl clinging to a fake smile. My editor said, 'She must be really ill…', and that decided it."
Remia = Envy
First name: Leviathan (Levia). Last name: snake
"She is not envious of others, but she enjoys having others be envious of her. She is the oldest one, so she acts like an older sister, but is in reality the type that can’t grow up. She has the pupils of a snake."
my post only mixed up the two, but was right with all the rest
wrong
Anon pls.
anyway, thanks for insightful artist commentary, I never knew for sure that it was a thing, thought that all the/u/discussions with sin theory were based on pure speculation.
Glad to know everyone's name references, for I only knew about Remia being leviathan before, also noticed that she indeed has that senpai/onee-san complex. And yeah, never actually paid attention to their surnames! Maybe except for Asuna - I knew her being Yagi has something to do with desire, since goat is Bacchus sacred animal and Bacchus is quite a promisquous deity.
Sasuga Amano-sensei, she never gives any of her heroes a random name with no second meaning, just like AI being Philos in Philosophia.
Oh, and I also had some random versions about their hairstyles, glad this turned out to have relevance too!
Btw, someone up there in this thread has posted an animal chart of the girls, everyone seemed to be spot on except for Asuna who was given a "cow" label instead of "goat"