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Character customization is the new feature introduced in Sword Art Online Hollow Fragment and Namco Bandai has revealed the character customization menu. Not only Kirito's hair and his face are changeable even his voice is changeable, but it should be noted that customizing the avatar will not effect the gameplay or story line.
Hollow Fragment Character Customization Options
Below are the few avatars of Kirito designed by using the above menu.

Hollow Fragment Character Customization Avatar Hollow Fragment Character Customization Avatar 2 Hollow Fragment Character Customization Avatar 3
Also check out SAO Hollow Fragment User Interface

Philia is a new SAO Hollow Fragment character and nothing much have been revealed about Philia, but she was first shown fighting with Kirito and she regrets meeting the Red Guild Leader Poh. This time she was showed with Asuna having some normal moments, so the mystery still goes on what she really is.

SAO Hollow Fragment Philia and Asuna
Some new sword skills have also been added to Sword Art Online Hollow fragment named as Savage Fulcurm and it's a single hand sword technique. Holding the sword in an horizental manner to do damage thrice while forming a capital letter A.

Hollow Fragment Single Hand Sword Skill Savage Fulcrum SAO Single Hand Sword Skill Savage Fulcrum PlayStataion Vita Single Hand Sword Skill Savage Fulcrum
New game events of Sword Art Online have also been showed. Sinon sitting on Kirito doing romance or may be helping him, while Strea was shown blushing with her hot food.

Sinon CG Event Hollow Fragment Strea CG Event Hollow FragmentSword Art Online Hollow Fragment will be released on April 24, 2014 for PlayStation Vita console.

Source: Denegki Online