This is Frisk, the Protagonist from UnderTale.
Also, i have not completed this game yet. So please do not post spoilers in the comments. Thanks :)
Edit: I was actually calling him "Protagonist" to avoid spoilers for people, but it seems people already know it. Fixed.
ＩＦ ＹＯＵ ＤＯＷＮＶＯＴＥ, ＰＬＥＡＳＥ ＬＥＴ ＭＥ ＫＮＯＷ ＷＨＹ ＳＯ Ｉ ＣＡＮ ＦＩＸ ＩＴ :)
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