Tina

She is on the northwest outside of the bank, with her sister.

The sisters only appear during Double-XP weekends, and not always. When they appeared during the Double-XP weekend of Feb. 5-8, 2016 (Super Bowl 50 weekend), they gave away the following items each day:
 * -, , and
 * -, , and

On Memorial Day weekend, 2021, only appeared.
 * On Memorial Day she gifted, which grants the title.