"Unlikely friends" refers to a situation where two or more individuals who are very different or don't seem compatible become close friends. Full definition
A wild horse saves a young boy's life after a terrifying shipwreck and the two become unlikely friends in Carroll Ballard's cinematic tour de force, adapted from Walter Farley's classic children's novel. (criterion.com)
A partnership between the Pendleton Correctional Facility and the Animal Protection League in Anderson, Indiana, brings shelter cats to... → Read More: Cats Seeking Forever Homes Find Unlikely Friends Within Prison Walls (laurelwoodvets.com)