Loyal, adj. Dedicated to the happiness of a single individual to the exclusion of all other considerations.

2004 EVELYN LEVINE GOPUSA 16 Nov. "I don't think that [Colin Powell] fit in too well as Secretary of State and that Ms. Rice is loyal to the President and will clean that office up .... Besides this is really President Bush's grand slam election and more people are respecting him now for his intelligence and capabilities and he needs 100% loyalty and a stress free cabinet that wants to work and not fight for their agendas."