unicode said: Is my translation extremely crappy or is it supposed not to make any sense?
Sanae has a spell card called "Miracle Fruits", derived from her ability to create miracles. (A miracle fruit is an actual fruit, too.)
As I recall it, the "LOL" part of it comes from "Sweets (LOL)", a derisive term directed at gullible ladies who follow any trend they see in fashion magazines, primarily ones that say they can eat sweets and still lose weight.
Japanese Touhou fans simply combined those two elements to give Sanae a new nickname.
Updated
HelloWhat is that?It's mountain's crimson glory vine.because it is a fruit (laugh).SanaeNo-What is "fruit of mountain"?Ah, vocabulary cards!Here goes a question!There-Huh?