Soleam |
Red Lantern as in the DC rainbow corps? They're always angry and spit acidic/fire blood, right? Bloodrager focusing on fire or acid seems the closest match thematically and in terms of powers.
The Flame Oracle would be more on the fire side, but not much in the way of rage. Alternatively, maybe a magus, with the Eldritch Scion (ACG, mixes in Bloodrager) or Myrmidarch (UC) archetypes. The Myrmidarch would give you more ranged options with fire spells.
Or you could do a Flames Shaman - less straight fighting and rage, but more flexibility, and you'd get a flaming cat you could name Dex-Starr.
For flavor, I'd probably lean towards a race that complements the weaker aspect of the class (half-orc or orc for an oracle or magus, or an ifrit for a bloodrager).
I was thinking for the flame oracle could get the ifrit englarge trait and get to lvl 7 flame oracle get the flame elemental revalation then 2 barb for rage and superstition. Then make myself a large raging fire elemental. Maybe Bloodrager with Blood line Black Blood or Dragon with Acid.