The keeper of the exclamation point is actually Lady Question Mark.  From The Riddle by Walter Alexander Raleigh, 1895.

From The Bab Ballads, written and illustrated by William Schwenck Gilbert, 1898.

From Caricature; Wit and Humor of a Nation in Picture, Song and Story, 1911.

Tomorrow?  From Busyman's Magazine, 1906.

"It's only funny if the audience (me, in this case) knows you know the answer is Mickey Mouse."
—Joel Siegel, Lessons for Dylan (2003)

An illustration from an 1896 issue of Punch magazine.

I dreamed of a ten-cent emotion in a fifty-dollar frame.

I dreamed X was a broken question mark.*

*as per Juan Felipe Herrera's Crash Boom Love: A Novel in Verse, 1999

An illustration from a 1910 issue of Hampton's magazine.

"A quest is to ask a question in motion."
—Robert Irwin, The Arabian Nightmare

I dreamed that a misplaced question mark obfuscated the entire meaning of Shakespeare's Hamlet.

(My typographical error dream was no doubt triggered by Fredericka Beardsley Gilchrist's The True Story of Hamlet and Ophelia.)

(Thanks, FutilityCloset.)

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June asks:

Q:  What is the difference between a crevice and a question?

A:  A crevice contracts and expands and holds little bits of darkness like water, shadow and air.  A question is something used to plumb the depths of a crevice.

—Geof Huth, personal correspondence

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June writes: