This is Pencil by NovaMangolia. This is their first MUGEN conversion and she originates from a web series on YouTube called Battle for Dream Island which is somewhat similar to Total Drama but with anthropomorphic inanimate objects. In MUGEN Pencil is mostly a zoning type character but her neutrals and combo game aren't to be underestimated either.
This character was released on August 9th, and was recently updated on September 15 to be more balanced. Older versions are also saved in the folder if you prefer the more powerful but less balanced versions of her.
MFG thread (includes a download link): https://mugenguild.com/forum/PHPSESSID.mmmu2rfvv01d0jdo8modsbc7oc/topics/pencil-bfdi-released-updated-9152023-198149.0.html
Goose Howard got a reaction from CoolAnimeHustler in [Battle for Dream Island/Char] Pencil by NovaMangolia Released 8/19/2023, updated 9/15/2023