The pronouns Ross reconstructs for proto-Eastern Trans-Fly are,
There's a possibility of a connection here to Trans-New Guinea. If the inclusive pronoun is historically a second-person form, then there would appear to be i-ablaut for the plural: *ka~ki, **ma~mi, **tapa~tapi. This is similar to the ablaut reconstructed for TNG (*na~ni, *ga~gi). Although the pronouns themselves are dissimilar, ablaut is not likely to be borrowed.
On the other hand, there is some formal resemblance to Austronesian pronouns (*(a)ku I, *(ka)mu you, *kita we inc., *(ka)mi we exc., *ia he.