Guardian ad litem
"[The] power to appoint guardians ad litem pursuant to [Federal Rule of Civil Procedure] Rule 17(c) is important not only to ensure that the minor's rights and interests are fully protected in cases where the minor is otherwise represented and there may be conflicts of interest, but also to ensure that the minor has proper access to the federal judicial system at all. Such fair access to the judicial system by minors and incompetent persons is enhanced if the district court exercises not only the power to appoint guardians ad litem, but also . . . to 'make such other order as it deems proper for the protection of the infant or incompetent person.' This additional power is necessarily required so the district court can effectuate its appointment of a competent, independent guardian ad litem."