Shijou Saikyou no Mahou Kenshi, F Rank Boukensha ni Tensei Suru ~Kensei to Matei, 2 Tsu no Zense o motta Otoko no Eiyuutan~ - Ch. 122

[HDMI1]

Should be third yes, but I feel like Fire has been left out for some reason, at least I don't remember him saving the fire spirit and I have read the whole thing, but then again with how rarely it comes out I might have lapses in my memory...
Also the phrasing of terms in this chapter seems wonky at times. Until now the ranks were always named as A-rank no.X or B.rank no.Y, but now they changed it to AN A-rank X place or A B-rank Y place, which sounds stupid, previous version sounded much better...

The Fire Spirit was the second one he rescued, she was located in a volcano. The actual rescue, and not the psychic requests for help he kept ignoring, started in Volume 11, Chapter 94.

The MC fought and beat the jackass from the Assassin's Guild he founded in his past life, then the Fire Spirit decided to turn the lava back on while his friends were still in the volcano.