Epic character. I seriously thought it’s just the studio adding some random effect to the video but to find out it’s and actual, physical (anime-wise) thing is quite surprising. And Sunrise didn’t hold back and put some emoticons which doesn’t match the stone’s age.
Even more surprising is it’s actually used for the story. It sure is a convenient pointer – pinpointing enemy’s weakness by creating… literal arrow. Amusing.
Season of loli? Oh and is it just me or they wasted one whatever-that-stone-is for transformation? Doesn’t seem economical but then again she’s filthy rich so it probably doesn’t matter.