Wash. Rev. Code § 11.130.305
(1) Except as otherwise provided in subsection (3) of this section, the court in appointing a guardian for an adult shall consider persons qualified to be guardian in the following order of priority:
(4) A person that provides paid services to the respondent, or an individual who is employed by a person that provides paid services to the respondent or is the spouse, domestic partner, parent, or child of an individual who provides or is employed to provide paid services to the respondent, may not be appointed as guardian unless:
[ 2019 c 437 s 309.]