D&D 5E Mythic Tiamat

[Thirteenspades]

Personally, I never thought of her heads as having a separate consciousness like Demogorgon. I've always seen them as separate appendages (like fingers) of a single mind / will.

I found this page on 1d4chan: Tiamat - 1d4chan
I too have no idea concerning Tiamat's (or the individual heads) alignments.