You'd just need to create an account on the wiki, then create a page for the charaquest and format the dialog
For example, clicking Edit on this should give you an idea of how it's generally formatted: https://wiki.housamo.xyz/Character_Quest:Garmr:VN:1
Without any hesitation, Garmr runs straight towards you using all four legs, bringing up the dust.<br/>
|dialogue=Master's scent! Garmr know it! It special! So Garmr, straight to it!