Day 4 has Fed Female Orion Sci Officer... been given away before and can get in game if you have T4 Diplomacy.
Just visit each day to Alienware Arena and claim each day's gift. Only real good in game item is the Elite Services Starter Pack for 1 toon on your account.https://na.alienwarearena.com/ucf/show/2086433
Day 1 & 3 is for alienware Arena perks.
Day 2 is a STO badge... not sure if in game costume or badge you can display at Alienware Arena.
Day 4 is Fed Orion Sci Boff
Day 5 is the grand prize and only real one I want/need. Elite Services Starter Pack for 1 toon on account.