Giant Inheritance

Hexproof and shroud won't prevent a Role from becoming attached to a permanent if the ability creating that Role attached to that permanent doesn't target it.

Cards in the Wilds of Eldraine main set create six different Role tokens: Cursed, Monster, Royal, Sorcerer, Wicked, and Young Hero. A seventh Role token, Virtuous, is created by Ellivere of the Wild Court, the commander of the "Virtue and Valor" Commander Deck.

If the creature Giant Inheritance would enchant is an illegal target by the time the Aura spell resolves, the entire spell doesn't resolve. It's put into the graveyard from the stack, not the battlefield, so its last ability won't trigger.

If you don't choose a target attacking creature with the ability granted by Giant Inheritance, the Monster Role token won't be created.

Some spells and abilities that create Role tokens require targets. If each target chosen is an illegal target as that spell or ability tries to resolve, it won't resolve. The Role token won't be created.

If two or more Roles controlled by the same player become attached to a permanent at the same time (perhaps due to an effect such as that of Doubling Season), that player chooses which one to keep and which are put into their owners' graveyards.