According to her biographer Julia Philips, Montalban had been described by her magical students as "tempestuous, generous, humorous, demanding, kind, capricious, talented, volatile, selfish, goodhearted, [and] dramatic".
Describing herself as a "pagan", Montalban's personal faith was Luciferian in basis, revolving around the veneration of Lucifer, or Lumiel, whom she considered to be a benevolent angelic being who had aided humanity's development.