Originally a weakling with very little stamina who was kicked out of the Tannis Militia, he barely escaped when the Tannis Beast Raids started. Despite struggling with the force of recoil and having a hard time even pulling the triggers since he was so weak, he took up firearms in an attempt to protect his home. But it wasn't enough. The beasts were too fast, and time and time again, he was overwhelmed and barely escaped thanks to someone else's help. What he needed was power at any cost, consequences be damned. So he took up the void arts for a time. Trying, and failing, to keep it hidden, it was used very sparingly, in emergencies only, but.. well... people found out.
Naturally, those around him didn't take favorably to his dabbling, even if he avoided unsafe teleportation at all costs. After being treated for Stage 1 void poisoning a second time (I'd have gone to stage 2 if needed, but his entourage happened to include multiple priests, so it never had a chance to get that far.) his healer had had enough and finally managed to convice him into trying something else: If he was so determined to protect his home and friends, why not train under her to learn Mercana and provide support that way? Kelsey wasn't very good at magic, but considering it's okay to take awhile to heal someone properly when they're not immediately under attack, he agreed to at least try. This led to Kelsey's Priest/Bonder phase; Izabe Install, God Rod + Blessed River Sword Kel shenanigans, and of course, Sanctuary + Ingrain + Adversity Tunic making him a wall to rally behind. Kelsey was still pretty physically weak (only hitting at all because blessed weapon, and only enduring because of magical assistance) but was becoming a reliable person that people turned to for help....
... so reliable, in fact, that he managed to convince an engineer with connections to Karaten to put in a good word for him to try to take him along as a research assistant; mechanations fascinated him and he wondered if perhaps they could help serve as replacement Tannis Militiamen to replace those killed by the beasts. After a long period of time, he finally got permission to accompany a research team into the Mechana Forest. And this is where everything went wrong. Kelsey's blind faith in Mercala led him to believe her blessing would protect him from the corruption, so he made a trail in the forest floor with his sword as he snuck off to explore a little deeper out of curiosity. While he did finally manage to escape, he started sneezing up butterfly illusions.
Kelsey was enraged. Mercala must be a sham! All the murai he'd donated, all the prayers he'd sent... nothing! Life as a human was over, and he was shunned by some people he onced considered his closest companions. The Mercana was dropped faster than you can say "wait." But it wasn't all bad. The illusions gave him an unexpected edge. Cobra Stance was used to emulate illusions, with him always one step behind where he appeared to be. Kelsey also still had his trusty Izabe to serve as another distraction, so he was free to swing away with all his might, which slowly, finally, helped to give him a bit of upper body strength so he wouldn't be a total weakling.
But that wasn't enough. Angry and lashing out, Kelsey wanted his nemeses, the beasts, to feel his pain, to feel his fear. Currently, Kelsey is a physical hexer/bonder, after levelling as a Dh, and armed with a Spectre Sword... but still carrying a simple handgun on his person as a backup. Kelsey still has his trusty Izabe companion, who may seem a little out of place, but serves as a reminder of how far he's come, and how much improvement remains to be made.