"She" ? Did you just assumed this moster card gender ? lol
btw, it's because embodiment is a trap card (count as a monster only when on the field), and 4-starred is also destroyed your flamvell, flamvell have to be still on the field, to resolve the effect.
also when time machine is activated, technically the monster is in the graveyard for a moment, but grunikas effect doesnt work due to the chaining order, atleast only duel world duelists have this card