Prepare the Buffalo Chicken. In a bowl, combine the chunked chicken breast and buffalo sauce, tossing until the chicken is evenly coated.
Assemble the Wraps. Lay out the tortillas on a clean surface. Spread a dollop of Greek yogurt onto each tortilla, followed by a portion of the buffalo chicken mixture. Top with shredded lettuce, diced tomatoes, red onion, and shredded cheddar cheese.
Roll the Wraps. Fold the sides of each tortilla towards the center, then roll tightly from the bottom up, enclosing the filling.
Serve. Cut the wraps in half diagonally and serve immediately, or wrap them tightly in plastic wrap for an on-the-go meal.