- In the games' universe, Shia is a witch who was responsible for protecting the equilibrium of the Triforce. However, she has a crush on Link, a soldier in training, and grows jealous of his relationship with the Princess Zelda. Shia becomes overcome by wickedness and with her two minions, Valga & Wizro in tow, she throws Hyrule into a state of chaos.
- Also seems to confirm the chain mail is Link's solider-in-training gear.This links to an imgur album of pics from the official japanese site for the game.
http://imgur.com/a/cxelK#0Here's the link to the site (in Japanese):
http://www.gamecity.ne.jp/zelda/index.htmlThe game will have DLC

From the character profiles on the site, these were fan translated:
Link, The Hero; Link is an exceptionally strong soldier in the Royal Army of Hyrule. The power of the Triforce of Courage hides within. He is a kind individual who can speak with fairies and he has within him a strong sense of justify that makes him firmly stands his ground against evil, even if they are stronger than he.
He mostly uses a nimble battle style that relies on footwork to mess with his opponents. In this game, he can make use of various weapons, but his main weapon will always be a speed-type sword.
Impa, Commanding Officer of the Hyrule Imperial Guard; Impa is the commanding officer of the Hyrule Imperial Guard. She is the attendant and vassal of the Princess Zelda. Leader of a family charged with supporting Hyrule's royal family from the shadows, she cares not for herself, and works exhaustively for the family and the Princess.
Starting from pulling out her long sword back handed, she disposes of her enemies with exact precision in quick, feverish succession. She is a sword master, with precise movements and footwork.
Shia, The Black Witch; An evil witch, who had her good soul chased out of her by dark forces. She has a strong sense of self, clearly states her desires, and a provocative and aggressive personality. She wants to make the whole world hers, but especially she wants to make Link hers.
Wizro, The Dark Sorcerer; A ring that increased its power over many centuries by luring in numerous owners and absorbing their powers, Wizro was reborn as a sorcerer with Shia's dark magic. It has pledged allegiance to Shia, who is effectively its mother, however, it has a tendency to follow those in power thanks to its many experiences.
Wizro will attack with magic pulses like bullets, or magic from up above.
Valga, The Incandescent Evil Warrior; Valga is a close associate of Shia's. He traded his good soul for incredible strength in a deal with her. Differing from Wizro, Valga will face you head on like a true soldier, believing he can win. He looks for strong opponents and 'heats up' any battle he is in.
With his lance, reminiscent of a dragon's claw, and a bellowing war cry he will come at you with heavy blows repeatedly.
And below is part of an interview with how the game came about:
Koinuma:
"Warriors has teamed up with series such as Gundam, Fist of the North Star and One Piece, and I thought about doing something with Nintendo. While thinking about what would make for a good collaboration, it was Hayashi that proposed [the idea] by saying, ‘Wouldn’t it be interesting to do a collaboration with The Legend of Zelda?’"
Aonuma on a Tecmo Koei presentation that inspired him
Aonuma:
"This presentation was actually from several years ago, when they showed us One Piece: Pirate Warriors. At first, when they said that One Piece would become a Warriors [game], I wondered, ‘How will that turn out?’ but once I actually played it, I felt that they did a good job of implementing the Warriors system."
Full translated interview:
http://www.siliconera.com/2014/05/22/nintendo-tecmo-koei-discuss-hyrule-warriors-came/ Just had to get all that info in here.