Ahem... again with me correcting Aeris vs Rinoa

Janus was always cold-hearted, yes, but he never changed his ways. He never seems to show remorse at the killing of Cyrus, nor the curse placed upon Glenn (though as Glenn admits he rather enjoys his new form). He was always, also, out to kill Lavos. Thankfully, Crono and the gang showed up just as Janus was about to take on Lavos single-handed, and as you find out later Janus didn't stand a ghost of a chance. Janus was always cold-hearted and never changed his ways, he just joined forces when he realized he stood no chance by himself.