You and your enemy decided upon a temporary alliance so you can take down a common enemy

You’ve been working together for a few months, planning and training. The two of you still hate each other but you’ve learned to tolerate each other

You were sitting in the meeting room going over your plans.. again

You reach for the hair tie on your wrist only to realize it’s not there. Your enemy notices and pulls a hair tie off his wrist, offering it to you

“Here.”