In your recent post, you mentioned that Garlude is looking for Melem’s soul alongside Jecra's. How would everyone react to Kirby’s soul matter being from Melem's soul?
Garlude She was worried about Melem's soul for a long time given the fact that it had been separated from her mind. Seeing that it's not only in good shape, but also has become such an accomplished fighter just makes her beam with joy. The search has concludes in a good way!
Morpho Knight They have taken note of this fact earlier than anyone else and watched over the child closely as a result. Too bad their first proper encounter was tainted by the presence of the two halves of Elfilis, who they swore to murder to death.
Galacta Knight That Kirby was his child was surprising enough to him, but that he actually found Melem’s soul back was a big relief to him as well! A part of his old friend gets to live on within Kirby almost overshadows his sadness when it comes to realizing that he missed out on raising him.
Meta Knight Finding out that Kirby is the soul of Galaxia's sword spirit most certainly caught him off-guard. Part of him questioned whether he is supposed to pass the blade on to Kirby, yet Galaxia assured him that as long as he lives he'll remain her most suitable wielder.
Kirby Kirby himself doesn't know what to make of this information. In the end it doesn't change much for him. Thinking of Melem makes him feel fuzzy inside, though, something most Soul Matterborn experience that were born from the souls of the dead.
Xandos When he gave Melem’s soul to Galacta Knight for safekeeping he did not expect this to happen. Part of him feels betrayed by Galacta Knight, yet in the end seeing that part of his sister can get to live on outside of the confinement of a sword does warm his heart just a little bit.
Blood Knight Since Kirby is a mix between both of her old crushes Blood Knight has some more complicated feelings when it comes to Kirby. It does feel bitter that she's excluded, yet ultimately this is a positive conclusion in her mind. The sinister past has been left behind and given light to a jolly pink puffball.
Galaxia/Phantom Melem She recognized her soul right away, yet didn't notify Meta Knight about this until way later. She explicitly asked Meta Knight to hand her to Kirby during KATAM to confirm her suspicions and test if he'd notice himself. Galaxia is relieved to see that this part of herself which she willingly gave up on turned out to live on happily.
Alright, these were the most notable ones I could think of! Honestly, I am surprised this obscure lore detail I buried somewhere caught the attention of two separate people. Incredible!
Edit: This is no longer canon to my main AU.