Evil Half-Celestials and Good Half-Fiends?

[Jamieface]

Simply enough, is it possible? Their respective templates say they need to be Good/Evil, but is this only that they start off as that, then can go through the slippery slope of morality changing through roleplay, or will they always, always be good/evil?

[Claxon]

Technically, becoming a half-celestial or half fiend changes your alignment.

In regards to whether or not a creature could slip from that...there are fallen angels and redeemed succubi, so anything is possible.

The real thing here is ask your GM. If you are the GM you decide.

On a persona note, as a GM, I wouldn't allow players access to either template. I also wouldn't create a "gotcha" where characters think a creature is good or evil because of the template and then surprise them with the other. I might add a character that is known to be a fallen celestial or a risen feidn that they could encounter.

[GM Lamplighter]

Half-fiends are not just evilly-aligned, they have the evil subtype, which cannot be changed any more than your race can.

[LazarX]

The thing with evil half-celestials and good half-fiends is that both Paladins and Anti-Paladins can team up to smite both of them.

[Kazaan]

Remember that 'Good' and 'Evil' aren't just abstract, ephemeral concepts in Pathfinder. They are tangible forces just as real as gravity and electro-magnetism are to us. Celestials aren't just 'Good' in a moral sense; they are made of Good. Half-Celestials, likewise, are made partially of Good; that is, the "Good energy" of the Good planes. That gives them a strong lean towards Good morality, but it can be compromised just as can happen with a fallen angel. Usually, though, this entails a reversing of polarity and the 'Good energy' becomes 'Evil energy'. Fallen Angels become Evil outsiders; their original 'Good energy' does a 180 and turns Evil. They trade out their Good outsider powers for Evil outsider powers. For all intents and purposes, a Half-Celestial would have a very strong innate force that compels them to do good, but if they are subject to a VERY powerful influence towards Evil, they would effectively change from Half-Celestials to Half-Fiends.

[j b 200]

Actually, neither Half-Celestials or Half-Fiends have the Good/Evil subtypes. They are merely the offspring of a Good/Evil Subtype outsider and a mortal creature from the material plane. Since they're just Outsider (native) they can be of any alignment. They are also only subject to Smite abilities due to their actual alignment.

This is in contrast to Celestial or Fiendish Creatures (monster w/ simple templates). A Celestial Lion has the (good) subtype and are creatures formed form the essence of good aligned outer planes (say Heaven or Elysium). A Celestial/Fiendish creature is almost always only Good/Evil respectively, wish some very rare exceptions (See WotR).

[Kazaan]

Ok. I was under the impression based on the thread that half-outsider templates applied alignment subtypes. If they don't, then it's basically the same concept as having an evil Aasimar or a good Tiefling; no planar energy mechanics to consider at all.