Possible Clues:

• We take back Iris maybe finding him turning beastly
• People like us grow up being transformable
• Hairy role? (this one's hiding backward)
• Lycanthrope, shape changer
• Scarily unpredictable type used to be a composer
• Plant brought back by partners is a hybrid
• Horror film creature, maybe
• The pair of us rose, perhaps, retreating from this lupine menace
• Person beleived to be able to assume lupine form
• Almost soaked getting up-river, one's disturbingly transformed