Title: 遠い日の春花② - The Spring Flower of Days Long Passed (2)
Straight from Japan: the name of the elf is "チッチ", which I guess could be romanized as "Chicchi" among other things.
She's the spirit of the flower and is excited that Guts is the first one to summon her. She exerts herself, using up all the leaves to cure him, but dies the next morning as a result.
So as expected, it seems the previous comment about Guts' feelings towards elves should be taken with a grain of salt. It seems he was rather traumatized by the event.