Collective plural
Mirja nouns are not marked for true plurality, and Mirja mostly doesn't care about plurality on a large scale, but it does possess a collective plural marker, which is used to mark nouns as referring to all members of some contextually-inferrable group. This is one of Mirja's few templatic morphemes, and takes the form of a CVVCV pattern aligned to the right edge of a word; usually this involves simply lengthening the second-to-last vowel and shortening the last consonant if it isn't already short:
nali
person
'person' ~ 'people'
nali-**
person-that-PL
'people (in general)', '(all of this group of) people'
This change applies after other morphology is added:
nali-ku
person-that
'that person' ~ 'those people'
nali-ku-**
person-that-PL
'those people (in general)', '(all of) those people'
Personal pronouns behave a bit uniquely when pluralised with this marker. For one, since personal pronouns are short CV forms, in order to fit the CVVCV template they have to be reduplicated—so no '1SG' becomes noono. Since this is effectively taking two segments and assigning them to five locations, changes to those segments affect them everywhere they appear—so when noono is topicalised, the result is nhoonhoo, not *noonho. (This also means that apparently consecutive /s/s are actually just one segment and thus don't trigger dissimilation, so su pluralised is suusu, not *suuthu.) Additionally, for the first and second person pronouns no and ma, their plural forms noono and maama are actual true plurals rather than collective plurals, and are used whenever you have first or second person referents that involve more than one entity.