Jérémie Kermarrecさんのイラストまとめ

Itahana says Lani's design is actually based on Pele (the Hawaiian goddess of volcanoes) because Minaba wanted to include a nod to Hawaii, where the game was developed. So Itahana designed her as a character who erupts when she gets angry, and her weapon is red because of lava.

Although they are not mentioned in the interview, I think we can surmise that Itahana also designed Beatrix, Doctor Tot, Terra's other genomes and Stiltzkin, among others. This is also based on the similarity in their artworks, so I could be wrong.

Among the NPCs designed by Itahana are Fratley, Lani, Mikoto and Alexandria's inhabitants, according to Famitsu's interview. He also worked on a number of other tasks, such as designing props (like Vivi's ticket), overseeing weapon designs and fixing background graphics.

Finally, Murase also designed Zorn and Thorn. He wasn't supposed to work on secondary characters, but he had some spare time after his work on the FF movie was complete, so here they are. (He adds he also worked on summons, but doesn't say which ones.)

By the way, in 2011, Shuko Murase drew a promotional image of Kuja for the arcade card game Lord of Vermilion 2. What's funny is that he added the bird from Amano's artwork! (I'm sorry, the image is quite small.)

Although they are not mentioned in the interview, I think Murase also designed Cid and Garland. This is based on the similarities with his other artworks, so I'm not 100% sure (I'll let you judge).

Now, about Eiko... Murase's comment is only centered on one thing: how he tried to create a deformed version of the duck face (in Japanese: アヒル口) which, he says, “was popular at that time”. Oh, was it already?

As mentioned before, Vivi was designed by Hideo Minaba. The idea to feature a Black Mage came from Sakaguchi's “back to the roots” theme, as a symbol of the series' oldest entries.

(Not entirely sure that artwork is by Minaba. Zidane is there for scale.)

Murase remembers Garnet's design was loosely based on Nausicaa, because he knew Sakaguchi was very fond of her. Besides, he had trouble striking the right balance between the size of her body and head.

For Zidane, Murase was requested to add spiky hair because it was the new trend for FF heroes. The blue costume was inspired by the French “Gitanes Bleues” cigarette packs. And guess what? Gitanes is spelled ジタン (jitan) in Japanese, the same as... Zidane's first name 🤯