(sorry if I'm guessing more than allowed I don't know if there are any specific rules)
the hint was 52, the symbol on the helmet looks like an infinity symbol, in hitchhiker's guide to the galaxy the 'meaning of life' is, 52 - 10 = 42. My guess is either 'infinity' or 'meaning'

EDIT 1: I just realized that 52 has to do with playing cards, guesses would be 'hand' 'tarot' 'reader' or even 'kingdom'.

EDIT 2: 52 is the atomic number of tellurium, tellurium seems to have a maze like structure on the surface that almost matches the symbol on the helmet, guesses 'maze' or 'ridge'

EDIT 3: 52 is a 'bell' number, 52 weeks in a year, 52 characters in the english alphabet, 52 white keys on a piano