Update [11/2/24]: Added some eye shine, a small detail long overdue for my stuff.
A strange thick goop globs on Kioshi's hand. She nonchalantly suspected it to be a failed, benign biomatter experiment and searched for a cleaning station to safely wipe it off.
The riolu felt a strange presence coming from the black goop... ...It's alive!?
By the time Kioshi figured out what it really was, it had already spread over her hand. The riolu shudders in disgust and fear as the black slime continues to cover her arm - Kioshi is not frozen in fear, but is well aware that her fate was sealed and is powerless to stop it.
The black slime continues to take over Kioshi, giving icky sensations as it crawls over her face, causing her to panic. She desperately pulls the slime off in hopes of stopping it, only for it to easily spread over her other hand. A pitiful, instinctive last ditch act against the inevitable.
Poor Kioshi knew she couldn't fight it even if she tried. The riolu sits on her knees, surrendering herself to the black slime, the slime gladly slithers into Kioshi's mouth. Its eerily smooth texture accompanies a very bitter taste, sending a chill down Kioshi's spine...
The black creature creeps into the host's mind with a deep, dark, omnipresent voice. Kioshi opens her eyes in surprise, only to see the rest of the creature weaving itself over her face, sealing her tightly in its essence.
The entity takes a good look at her new skin, its black, sleek texture feels silky smooth, similar to latex... A wave of desires swim through her mind, grinning with wonder and delight...
Kioshi the Riolu is by me. Venom and the symbiotes are by Marvel.