I'm considering making one "creature" that is encountered in a story a sentient star in an alternate universe. I hope to hand-wave a little of the more complicated stuff by saying "this universe's constants are different", but the problem is I don't even know where to start when making a star sentient. Surely I'm not the first person to write about such nonsense, but I'm not sure where to look for examples for inspiration.
Can you give an example of how it could work, or a reference to another author who has done it already? I want it to be at least semi-plausible, not just say "This is how it is, deal with it." Note that "sentient" doesn't mean it has to be an animal of some sort, just a being with self-awareness.
Edit based on comments: I was considering that all stars in this universe could have developed intelligence in the same fashion, assuming that's plausible. But as far as them being a race capable of reproduction, I'm guessing that's better to skip for simplicity. Let's say they just "developed" intelligence somehow, through natural causes. How could a star contain a kind of "brain" or some capacity for intelligence?