Official website: http://atelier-ps3.jp/totori/
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Info from Famitsu/neogaf:
Totorie (...Totouria...? Helmond), age 13 is aiming to become an adventurer to find her mother who was an adventurer of significant reputation. Lives with father and older sister, but no artwork for them yet.
Gino Knarve, age 14. Childhood friend of Totorie.
Mimi (Mimi Ulie von Schvailzrung or w/e) age 14, tsundere, condescending, wears hot pants. Basically takes the role of Cuderia from Atelier Rorona from what it sounds like.
Takes place 5 years from Atelier Rorona
Adventurer License System
Significant improvement in graphics
The 3D models were revamped to closer replicate Kishida Mel's 2D character art.
Game concept is (again) returning to the Atelier series roots.
There were comments mentioning Rorona was too easy so difficult has been increased.
Able to venture in the entirety of the Arland continent
Same atmosphere as previous Ateliers.
Rorona is 22. Searching for Hom & Astrid while spreading the knowledge of alchemy. Meets Totorie during this time.
Totorie's attire is based off of Rorona's tastes.
As your Adventurer's License class increases, your range of travel increases and is somewhat similar to Atelier Viorate.
Whether there's a deadline to complete the game is a secret at this point, but there is overtime.
Development is more or less done. All's remaining is polishing it up.
1.25x the voiced dialogue of Atelier Rorona
Battle system's been revamped. Visually similar to Grandia in how the attack order is displayed on an icon graph.
Aside from HP, there's now MP and LP.
Cut content and improvements based on gamer input has been added.
More events
Everyone's support of Atelier Rorona has made Atelier Totorie possible.