Haw. Rev. Stat. § 560:3-720

If any personal representative or person nominated as personal representative, or an heir or beneficiary if a personal representative or person nominated as a personal representative refuses to act, defends or prosecutes any proceeding regarding the validity of a will in good faith, whether successful or not, that person shall be entitled to receive from the estate reasonable costs, expenses, and disbursements, including reasonable attorneys' fees, regardless of whether counsel has been retained on a contingency fee basis.