I added dual forms to the personal pronouns of Shonkasikas. Most add -bre to the plural stem to form the dual. The 3rd person inanimate pronouns take -ri. This pattern mimics nouns. I believe other pronouns and determiners will also have dual forms. Adjectives and verbs do not have dual forms. Dual nouns and pronouns trigger plural agreement with verbs and adjectives.

See the personal pronouns here.