How does the damage based on height work? Does she hit harder if the enemy is higher up?

It's the enemy level. If it's a multiple of 3 for example it hits for more. for lldyra her lb if llydyra's level is multiple of 3 it raises the ct gain effect

Next time you're in a mission there's a blueish green number and the letter H below options, that's the height value... I don't know if say 1.5 is divisible by 3 tho, but don't worry about it except for raids, arithmeticians are for instacasting a lvl4 ele-ga against enemy UR who is weak to the element, nearly killing them usually.
source: pvp kilphe user who gets 1hko'd by leela

The ability says “damage porportional to target’s height”. Tested in a map with multiples of the same enemy at different heights, I do more damage to the enemy floating at a higher elevation (a crystal), but my damage does not change as my height changes.
So seems to do more damage the higher the enemy’s elevation is (doesn’t matter what elevation your unit is at). (Tested with Halloween Leela)

Could someone please answer this for me? I've been confused since forever with Ildyra and now Halloween Leela too. Height 4 to 3? Height 3 to 2? Does it just let you target people of higher elevation? It seems to do that and add damage somehow?