Bosun Blake is a pirate who lives in Ventureland. Like the other pirates, he escaped there when his home, Tortooga, was overrun by his former crew.
There's not much he has to say during the first visit to Ventureland, but if Mickey didn't repair/destroy Hook's Machine, as well as ruin any hope of a relationship between Damien Salt and Henrietta, Blake will have a Quest for Mickey.
If Mickey follows through and clears the junk out of the Treehouse, Blake will award Mickey with a Silver Pin.