There are nine pronominal prefixes possible on a Carib transitive verb. These prefixes express 1st person, second person and more complex category that is called 'first and second person' by Courtz 2008. Number is Singular or Dual per default. Plurality is expressed via temporal suffixes.
Moreover, the sets of person markers have different usages. The passive prefixes on transitive verbs have the same form as the person prefixes on intransitive verbs and the middle prefixes on transitive verbs have the same form as the person markers on middle verbs.
The passive prefix ky- (1&2) does not specify, whether it is 1 > 2 or 2 > 1 or whether both are object with a 3rd person subject. An example from Courtz 2008:
kykupija may mean 'He bathes you an me' (3 > 1&2) or 'I bathe you' (1 > 2) or 'You bathe me' (2 > 1).
The data can be looked up in this Excerpt from Courtz, Henk. 2008. A Carib Grammar and Dictionary. Magoria Books, Toronto.