I make fun of him a lot but I really do have a soft spot for terra. I think the stories of birth by sleep are all a little clumsily told, and his suffers a bit from the very goofy meme problem of "every time he arrives in a world, he walks straight up to the most evil, manipulative person he possibly could." but I think it also hits the hardest for me out of the three when it works. and his final line of his story in BBS, "one day I will set this right," is absolute top tier KH for me
