does the hexblade warlock answer to any entity?

Normally when the warlock makes a pact with a patron, the warlock is usually making an exchange of services, offering the soul in exchange or as a guarantee, so who is the patron of the hexblade? Is it an evil or a benign entity? What is the warlock's duty to the pact of the hexblade?

Because a person making a pact with an entity without having consequences or having an effect on the character's personal quest is quite strange.