The provided reference does not specify who Sita was in her subsequent (next) birth. However, it clearly states that Sita herself was a reincarnation of Vedavati, making Vedavati her previous incarnation.
Vedavati, a devoted ascetic, had immolated herself by leaping into a ritual fire (havan). As prophesied, her rebirth as Sita was the crucial triggering cause for the demise of the demon king Ravana and his relatives, with her husband Rama ultimately serving as the agent of this destruction.
