Critical Weaknesses

Throughout a rather technologically advanced room, a duet of agonised tickle-filled laughter permeated... These two laughs belonging to none other than Sandrone and Columbina. Two girls you'd least expect to end up in a tickle machine of all things, given one was a high ranking Fatui Harbinger, Sandrone, and the other was the Moon Goddess, Columbina. However, despite being fairly powerful, they were way too weak to being tickled~ Sandrone, the one who was a mechanical being, like a puppet, tried her best to fight back against the unbearable ticklish sensations that her belly and her belly button were being forced to go through, although it was fruitless as she still ended up screaming and begging for mercy as the mechanical hands and the fluffy belly button drill-like brush tortured her synthetic skin relentlessly with tickles, making her really wish she wasn't made with synthetic skin that mimicked the human sensation known as touch so easily, realising that being so weak to tickling was a clear oversight of this design philosophy... Columbina, the Moon Goddess, despite being this mysterious and eerily quiet girl to most, it seemed like she couldn't handle any of this tickling, not one bit. The way the hands skittered across her slender tummy, it made her scream with laughter. The way that fluffy 'drill' spun and vibrated inside her innie belly button made her voice hit pitches and notes she didn't even know were possible for her despite her love for singing. Every second was excruciating for her, as she really cemented herself as the one that was probably the weakest of the two here, in terms of raw ticklishness and mental resistance when it came to tickling... Something that could probably be thanks to the fact that nobody would even consider trying to tickle a girl like her, meaning up until now? She'd barely, if ever experienced being tickled! So she had no idea how to handle it~ That being said, Sandrone's design oversight making her also inhumanely ticklish, even if an accident, was nothing to gloss over. Perhaps if she were a more 'natural being' like Columbina, she'd also be in a more similar state to Columbina... In other words she only has her rigid programming holding up her 'mental' state. Although, even the toughest of rocks erode, and Sandrone was anything but a tough rock~ So one can only assume Sandrone's time before she did become like Columbina, was very limited~ It was very clear that for the both of them, their bellies and belly buttons were extreme weak spots for the both of them when it came to tickling. For Columbina, it was just by unfortunate circumstances... For Sandrone? It was an unfortunate oversight in the creation of her synthetic skin... --- Sandrone and Columbina! Two very lovely girls from Genshin Impact, with Columbina being one of my favourites for sure. Although their chemistry from what I've seen is utterly adorable so I couldn't help but put them both in tickle hell together where they belong! Please do note that I don't play Genshin anymore myself, so most of my knowledge comes from random pieces of memes, posts or whatever some friends might tell me. So don't expect that mini story above to be completely accurate in a lot of regards, so don't complain if there's a bunch of them here. At the end of the day we're here to see two cute girls be tickle tortured way beyond their mental and physical limits ^^