Haw. Rev. Stat. § 414D-139: Removal of designated or appointed directors.

(a) A designated director may be removed by an amendment to the articles or bylaws deleting or changing the designation.

(b) Except as otherwise provided in the articles or bylaws, an appointed director may be removed without cause by the person appointing the director.

(c) The person removing the director shall do so by giving written notice of the removal to the director, and either the presiding officer of the board or the corporation's president or secretary.

(d) A removal is effective when the notice is effective unless the notice specifies a future effective date.