Iris and Madison despite being on opposite teams created a bond when Chad and Jade tripped over Iris. Madison went to help and said "You can never trust anyone in this game". From there she suggested that they become friend for the game. Iris agreed to this idea and although Madison denied that the idea was an alliance it was indeed a friendship of friends (Technically an alliance for this game). Due to Iris's accident on the plane it made her a target and due to her failing in the Musical Dares challenge it caused her to be eliminated. Due to Madison being the only member left in the game from these 2 friendship this alliance became nul.
Iris - Episode 1 Part 2 - Episode 2 (Eliminated in Episode 2)
Madison - Episode 1 Part 2 - Episode 2 (Last member of the "alliance")