you give him items until you get an orange heart when u get the orange heart you can then get the clue feather (buy it from supermarket) and when gray has a full red heart give him the feather and he will marry you same with everyone else
first, you need to experience all the heart events.. you can speed it up by giving him the things he likes like ores, curry and eggs.
Just give him everything he likes and when his heart turn to red, his proposal is his red heart event
If you get all of their Rival Heart Events, then yes they will get married.
No he doesn't but if you go to the link I left and you can see who does.
a gray monkey
Winter6
At Gray's Shop
No
yes, in fact her name is Brenna Gray
never he never does
It's just a glitch.
gray and brown