So Wyll through his special trait 'blade of frontiers' is able to use rapiers, which is nice because it gives him a beefier martial weapon to use that most warlocks can't and fits his name. That's all great.
The weapon itself however... is not a rapier. He is equipped with a saber, one that is close to a cavalry saber or naval cutlass from the real world, which is very different to a rapier. A rapier has quillion(s), which allow the sword to sweep through the open space between fighters in a point oriented fight to engage a blade. This makes the rapier look, handle and fight very differently from a saber
I looked to see what a saber would be in 5e and I couldn't find it on any of the weapon lists, scimitar would be a closer fit in terms of a curved sword that can cut or thrust.
My suggestion is thus: Please change the model of Wyll's sword to be a real rapier or add a saber classification to the game and make it that.
![[Linked Image from i.pinimg.com]](https://i.pinimg.com/736x/a6/a5/4b/a6a54be104afe1035569383f9437d400--rapier-sword-swordplay.jpg)
Second image for a more broad look at sword types throughout history
[img]
https://preview.redd.it/qjbsuczmjoy...4c3dfd7cc07a9a80ba758140f74416ec4127566c[/img]