When the designs for the first 8 characters (Alice, Snow White, Red Riding Hood, Sleeping Beauty, Cinderella, Pinocchio, Gretel, and Kaguya) were revealed, the notes by the director and author, Yoko Taro, repeated "Very cute! I believe she’ll/he'll sell well!" for each character. When the 9th character (Little Mermaid) was revealed he used his note to directly address his lackluster comments:

"I’ve been commenting my honest feelings of “Very cute! I believe she’ll sell well!” about all the designs we’ve presented up until now, but someone pointed out that “Yoko Taro is really slacking it with his comments.” So this time, please allow me to change the comment to: “If we’re talking cute or not cute, then she’s very cute! If you’re wondering whether she’ll sell well or not sell well, I think she’ll sell well!! But even if she does sell well there won’t be any money in it for me or Jino-san, and I can’t sleep at night thinking about the wonderful people at Pokelabo or Square Enix pocketing the money!”
Contributed by DrakeVagabond
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Alice has several pocket watches underneath her maid outfit. A detail that was revealed by the character designer, Jino, and cannot be discovered playing the game.
Contributed by DrakeVagabond
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When the game was released on mobile platforms in Japan, the key art for certain characters were changed. Characters were altered to have less revealing outfits compared to the promotional material.
Contributed by DrakeVagabond
The "Foolish Sisters" enemy are three caskets with the crests and weapons of Three, Four and Five from Drakengard 3 engraved on them. They also display abilities they had in the Drakengard manga Drag-on Dragoon: Utahime Five that were not originally from the game.

• Five shoots a beam of light
• Four creates a shield
• Three shoots webbing thread
Contributed by DrakeVagabond
The "Loving Couple" enemy type is based on Two from Drakengard 3 using Cent's swords and Egregori's armor.
Contributed by DrakeVagabond
Zero's cleric job features her using Manah's staff from Drakengard 2 as her main weapon.
Contributed by DrakeVagabond