Sorry for writing this late but being with 2 jobs doesn’t leave me with much free time… 
As for the vote:
3 tier - Kamala. I just love her design and cover and was using her while in 3 tier.
4 tier - Polaris. sign I know, I know… It’s just that I don’t have favorites in there and she is sooo much helping me now that I have her.
5 tier - Kamala again. What can I do with that darn smile on the design and cover…?! xDD