Neb. Rev. Stat. § 25-308: Neb. Rev. Stat. § 25-308

The guardian, conservator, or next friend is liable for the costs of the action brought by the guardian, conservator, or next friend, and when he or she is insolvent, the court may require security for the costs of the action. The guardian, conservator, or next friend may be a witness in an action brought by the guardian, conservator, or next friend.