Elisa is one of the CPU Miis.
Elisa's first appearance was in Wii Sports. She is the best Mii in the game with being the Tennis and vice champion in Baseball. She appears in Baseball, Tennis with Sarah, and Boxing. Her dominant arm is right. Her rankings in each sport are:
She also appears as the trainer for Tennis.
Elisa serving tennis balls at the player as part of Tennis training
In the Wii Music artwork she plays the recorder.
Wii Sports Resort
Nintendo Switch Sports
In the 1.2.0 update, If the player holds L and ZL or R and ZR buttons on their Joycons while choosing a CPU strengh in match settings she will appear as an opponent in Tennis along with Tommy. Their title in the game is Legend.