Missouri Moseley
In Lawrence, Kansas, on November 2, 1983, there was a
tragic fire that claimed the life of a young mother.  That young
mother left behind two boys and a grieving husband.  A
husband who had seen things he couldn't explain away.  
Things that didn't make sense to him.

Missouri had been aware of it, and she wasn't surprised when
John Winchester showed up on her doorstep, seeking
answers.  People had always sought answers one way or
another from her, she had a gift.  The Sight, the Shining, it
was called many things, but she had been able to view the
world around her with another perspective since she was a
child.

This was just the first time someone had come to her honestly
looking for answers.  So she pulled the curtain back for John,
inadvertantly sending him off on his quest to avenge his wife.

She also wasn't surprised, when twenty two years later, his
two sons showed up looking for answers.  She proved to be
useful, recognizing in Sam a young man with great power yet
to be realized.  Even if she wasn't impressed with Dean and
his smart aleck behavior (threatening to beat him with a
spoon on more than one occasion).

She gave the Winchesters refuge after John returned to the
mortal realm, and watched over his sons as they recovered in
a New Orleans hospital.  She continues to guide them the
best she can, when they will listen to her.