Athelin is my pet for stats, spells, and transformations; Saedi is my pet for all other learnables. I will likely be unable to lend either of these pets as they will perpetually be in the Wonky and Bootleg pyramids. Currently, Athaeron and and Daelin are in pyramids as well and are unable to be lended.
I am always looking for low-priced items to buy and delete for Memory Points. :D