Is there a single adjective or noun that means "the right person for the situation"? I'm specifically looking for a word like "condign," "complimentary," "appropriate," "convenient," "codependent," or "mutualistic," but pertaining specifically to a relationship between two people and formed solely because of their situation. Think of two people who bond during an NA group meeting, or who become inseparable after both surviving a trauma, etc.
"When the battered plane landed and the survivors disembarked, they became ______."
"He's rich, she's broke; they're ______."
"They're work friends! That's how they get through the day -- she's his _______ !"
I realize you could fill in the blanks with a lot of things, but I've done some searches through the internet and my thesaurus, and I can't find anything with the right flavor. Any suggestions would help, help at least to narrow it down. I'm not opposed to making up a word, I just want to exhaust the possibilities.
This is my first time asking, so if I can clarify anything or need to correct my formatting, I'm open to suggestions. (And I hope this isn't too broad.) Thanks everyone.
