Kowalski

Kowalski was a male crew member of the UNSC Apocalypso, who flirts with Arrelts. He appears to be knowledgeable of the AI systems such as Melissa. He first appears in the memory that Melissa uses for her benchmark test in the Phase 2 Operator's Monologue.

Possible death

The name "Mat Kowalski" appears on the ONI Memorial at ONI Alpha Site in New Mombasa. This is probably, though not definitely, referring to Kowalski. His death may have therefore occurred sometime before October 20, 2552. However, it should be noted that the memorial may not be entirely factual, as it contains names such as Margaret Parangosky, who is known to have survived despite being listed as dead.