an ethnic German, is an officer of the engineers in the Imperial Russian army. He constantly watches the other officers gamble, but never plays himself. becomes obsessed with obtaining the secret.
Tomsky's grandmother's "young ward". Hermann sends her love letters.
'Three, seven, ace! three, seven, queen!'
Hermann goes mad and is committed to an asylum. He is in the Obuhovsky hospital, room Number Seventeen; he does not answer any questions, but keeps muttering with astonishing rapidity
Hermann's friend in the army