 If you liked
Rekka no Honoo
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 ...then you might like
Mahou Shoujo Madoka★Magica
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It's trivial but if you want the to the naming reference between some characters then you might like to watch both series, whereas Sayaka represents the blade, Homura represents the snake(probably Ouroboros, ergo time-travel) and Madoka the tortoise(could represent as spatial imprisonment, the barrier and her slow development).
It also share the same equation from the anagram emotion substituted to ((E)+(motion)) that could represent the sum of heat energy & kinetic energy and the way it was conserved to prolong Enthalpy and slow Entropy(I'm kidding, but it would make sense) which where the plot also revolves.