"if the other heard me talking out loud, they think that i am crazy... but since i am not , i dont care." what does that tell us about the olds mam's character?

Santiago is headstrong. He is used to the mocking of the young. Beyond this, Santiago is in love with the sea, The sea is his mistress, it is a mythical construct that the others do not understand. Every creature has its place in Santiago's world. The fish are more than a business to him, they are part of his universe. The others interpret this as crazy.