Captain Steven Dayna was the Commanding Officer of USS Lexington. The father of Melissa Dayna, he lost his wife during the Secession War.

Before leaving for Mission 161 he gave a special request to OPERS/LOGCOMM for assignment of Supply Officer.

He was talking to Jennifer Tran about the discovery of Pandora and this was overheard by Masaru Shindo.

Around April 8 he and Tran looked like under serious stress. On May 5 Dayna came on and made a terse announcement about the Lexington having engaged an enemy vessel.