Haw. Rev. Stat. § 663J-6: Joinder of parties.

(a) In the discretion of the court, two or more individuals may join in one action under this chapter as plaintiffs if their respective actions involve a person, business, business owner, or business operator who coerced the individuals into sexual exploitation, subjected the individuals to sex trafficking, or profited from coercing the individuals into sexual exploitation or subjecting the individuals to sex trafficking.

(b) In the discretion of the court, two or more persons may be joined in one action under this chapter as defendants if those persons may be liable to at least one plaintiff.