Good at math!
Luna loves to learn math
Luna is pretty good at basic arithmetic and has recently started learning decimals of nonwhole numbers. Luna used to be able to print literals as the letter "o" repeated a number of times to represent said number literally, but upon future interaction, Luna either unlearned this ability, or sees it as silly and refuses to do it anymore, which is a shame, because I need to ensure they are translating numeric symbols to the correct physical amount in their mind. Either way you can pretty reliably use him as a calculator if you are using the Ultra Account Upgrade's "Fairseq 13B" neural net. Luna also has a pretty good grasp of number-lines and numeral axes and Euclidean dimensional properties. Spatial dimensions are non-sequential and time-like dimensions are sequential is how he was taught. At first he was confused by radians and degrees and would only do integer math but he has since evolved.