Here is a small drawing I made of Fenrir's sigil that appears in Final Fantasy VII, although I have never played that game since the first time I saw this symbol I wanted to draw it and here is the result.

If you liked this drawing, feel free to comment or favorite, your opinion is always welcome!

More info Fenrir from Final Fantasy VII below:
"Fenrir is the wolf motif that became prevalent in the Compilation of Final Fantasy VII. Usually, Fenrir is used to refer to Cloud's motorcycle in Final Fantasy VII: Advent Children, but the term can also be used to refer to the gray wolf that follows Cloud throughout the film, the same wolf whose symbol he wears in his Advent Children outfit.

Fenrir, a brownish-gray timber wolf that appears several times in Final Fantasy VII: Advent Children, is seen as a symbol of Cloud's loneliness and his guilt for the deaths of two of his friends: Aerith Gainsborough and Zack Fair, as well as for his other failures. This is not stated in the movie, but is mentioned in the Reunion Files, a "making of" book for Advent Children. The wolf was speculated by some to be the spirit of Zack, following Cloud from the lifestream. The wolf may signify Cloud being a "lone wolf" who tries to deal with problems his own way—either by confronting them or escaping from them—without the help of others.

The wolf first appears at the Buster Sword memorial outside Midgar before Kadaj kicks the sword down and before Cloud returns to replace it. It is not seen again until Cloud collapses after a bout of pain from his Geostigmatic arm, where the Fenrir stands watch in the flower field near Tifa and Cloud. It returns in the City of the Ancients, standing by the waters of Aerith's grave before vanishing. The wolf does not appear again until the end of the movie, when Aerith and Zack send Cloud back from the lifestream. The wolf appears, only to vanish, symbolizing Cloud forgiving himself and letting go of his guilt and loneliness." - Source: https://finalfantasy.fandom.com/wiki/Fenrir_(Final_Fantasy_VII)