The default female Wii Fit Trainer puppet fighter represents Asuka Kazuma, a female character who is depicted wearing a light blue outfit with an exposed midriff.
The stage represents the Tsūtenkaku Tower in Osaka, Japan where Asuka is seen at the top of the tower on her bicycle during the opening cutscene of Tekken 5.
The Wii Fit Trainer's shielding references how Asuka is a defensive character, which allows her to perform counterattacks.
Other trivia:
This spirit's Lightweight ability increases the player's jump and move speed, which is designed to counter Kazuya's slow mobility and poor jumping height.
