The idea of family is rather flexible for Tyson, but how far does he extend the idea of ‘friend of my friend is my friend’?
He doesn’t extend his trust easily, but Tyson cares deeply about his friends and - though he may not get along with friends of his friends and may not even remotely trust them - he will do anything for them; even if it means throwing his life on the line for their friends.
If any of his friends request that Tyson watches over or protects someone, he will do so in a heartbeat. He’ll push for answers about why and who they are, always a scholar in his heart of hearts and endlessly curious, but even if he was refuses answers, Tyson would still be willing to risk personal harm to protect his charges.