As used in this chapter, the term "guardian" means a person who:

(1) Has been appointed to be the legal guardian of a child through formal proceedings in accordance with state law;

(2) Would qualify as a legal guardian of a particular child under Washington state law if formal guardianship proceedings were undertaken; or

(3) Is standing in the place of a parent to a child by virtue of the fact that, with apparent parental consent, the child resides with such person: Provided, That if no objection has been filed to such residency, parental consent may be presumed.