Yes, and sure.
FRODO: Note a house covering in the muddle for him
F
RODO: A spinning car? Add a vowel for him.
FR
ODO: Victual is a mess. Path in the middle. See him.
FRO
DO: She is a doctor, or is it him?
FROD
O: Briefly, French note, with a vowel in the middle, unearths him.
Now we each have had a password comprised solely of (one) of our favorite characters.