Kowalski
From Halopedia, the Halo wiki
Kowalski [1] is a male crewmember of the Apocalypso, who flirts with Arrelts. He appears to be knowledgeable of A.I. systems such as Melissa (A.I.). He appears only in the memory that Melissa uses for her benchmark test in the Phase 2 Operator's Monologue.
