Philia was first introduced in Sword Art Online: Hollow Fragment while Klein has been one of the key characters from the earlier parts of the series. Dengeki shows us what the two look like in Sword Art Online: Lost Song’s ALO.
The above is a comparison between Philia’s two looks. She seems to have decided to go with a different look this time around. Her involvement in the game’s story still remains unknown, but she’ll likely be joining Kirito and his friends as an ally.
Klein missed out on ALO the first time around, but he’ll be back for some action in Sword Art Online: Lost Song. He’ll use a katana as his main weapon as he did in Sword Art Online.
Sword Art Online: Lost Song will release in Japan on March 26, 2015 for PlayStation 3 and PlayStation Vita.