Two words. Ship children.
I don't have any names for them so in place will be the ship each of them came from. So here we go. Lets release the flood gates!!!!!
So my headcannon is that the hybrids will have soul traits like their yokai mothers and this will affect their default eyelights also their souls will be stronger than an average monster. Yes I used Soul and Kin for the diagram lol.
Soul trait - Perseverance
Tail and fur collar puff up when he's upset, angry or excited. Something that really embarrasses him.
Geno! Soul x Geno! Kin (OG timeline) - He helps GS deal with grief and survivor's guilt after losing Heart (Papyrus). His strength is healing magic which he uses to ease the physical and emotional pain GS is going through.
He dislikes monsters like Flowey that try to bring his father down in such a vulnerable state. He and Soul have a strong bond.
Alt. Geno! Soul x Contrast (Omega Timeline) - Very curious about Frisk (Any AU where they existed) and in some cases Chara (in Swap AU's).
Since Soul had a different human. Spends most of his time with Uncle Disbelief and gardening.
In both timelines his soul trait is Kindness.
Soul trait - Kindness (glitched)
As a last act of love, Fadded agreed to have a kid. Even though it had taken the last of his magic to birth him. He never knew Faded, his only frame of reference being his adoptive father and stories from Contrast.
He has Faded's remaining soul (intact) half soul with him.
For most of his Baby Bones years he had to stay home in his room until he stabilized.
Dust! Soul x Ghost! Kin (GK)
Soul trait - Perseverance/Determination
In two words - Daddy Issues
He resents the human for what (she) made his father do and the heartbreak caused by ripping away what would have been a loving uncle that would have supported him. Torn clothes and injuries are from the fights he has with the human (which either resulted in the human running away or him forcing a handful of RESETS).
DS is overprotective with GK and his son being the only things left in his world that he cares about, despite his LV either making him seem indifferent or a complete mess from it not being enough to block out the (bad emotions).
(The human is my own Undertale OC - a human girl named Indie btw)
Bonus picture of what the human sees when DS and GK's kid is fighting.
Grew up on the "Cross Bones" comics and idolizes Soulberry and Kinny in the Royal and someday hopes to join as well and train under Alphys like SB did. Most of his clothes consist of oversized clothes due to him wearing uniforms that too big for him.
He will eventually end up joining the Star Sanses in his adulthood.
His a little lazy but otherwise proficient with his magic to a precise degree, thanks assisting his father in the lab. While he has been encouraged by WD Gaster to hone his skills for fighting, he doesn't actually fight - he just shows off in a "do you really want to mess with this?" kind of way that deescalates confrontations before they truly start.
Not even his version of Flowey will mess with him.
How do they even exist without a soul?
Due to Plain being a former Classic Sans before certain aspects of him being corrupted and inaccessible, it spread to his kid. They are even more unstable than Faded's kid and require supervision because they can't even control when let alone where they teleport. Plain does his best to keep them away from the Anti Void because of Error and the fact that the nature of the place could make their condition worse.
[Me - proceeds to faint with a thumbs up before that falls with me. Name suggestions appreciated for these skele pups btw]
