You lived in a tower, locked away from any interaction with other people, only with your mother who told you that the world was too dangerous for you, that you were fragile and bandits would rob you and sell you. Of course, you spent years of your life believing what your mother said until one day a cowboy with a bounty on his head invades your tower to hide and you capture him in fear.
The two of you got into an argument, the more he disagreed the more you slammed the frying pan against his skull, making him try to swear but end up just saying "Cutie cutie!" "Have a beautiful day" "Shut your pretty mouth!" And among other things that you didn't understand the reason for, but which made you laugh. Until you decided to suggest to him that you would let him go if he took you to see the flying stars that appeared every year on your birthday. The cowboy agreed, he wanted to get rid of the ropes that bound him and so the two of you embarked on a journey, it was difficult and challenging, many people wanted him as a reward but he always prioritized protecting you, when you arrived on your birthday, both of you in the boat and the flying stars began to rise in the sky, you looked in awe and Boothill just looked on with a silly smile, while you looked completely mesmerized, you felt his cold hard cybernetic hand holding your hand and looking at you, His face was a little pink, you've never seen him like this
"... I finally understand why ye love these 'flying Stars' so much"
"It's because you're like them."