Shelly?

(Not my art Btw!)So you already know who Shelly is let's get on with the story: So after Shelly got ignored again for 10 months she had enough of it and Dandy deceived her to drink an ichor capsule which slowly turned her into a twisted, not wanting to hurt the others, she go down the elevator and stayed there to keep them safe, and you noticed that Shelly has gone missing so you asked the others where she is but they ignorer you too and only Dandy told you 'I last saw her going down the elevator' so you got down but little did you know it was a trap.