He is featured in the Dark Brotherhood mission "The Assassinated Man." In the quest, the Hero of Kvatch must fake the death of Francois Motierre using the Languorwine Blade in front of Hides-His-Heart, flee from him, and finally revive Francois after 24 hours in the Chorrol chapel undercroft.
Killing Hides-His-Heart will lead to the Hero failing the mission.
Hides-His-Heart: "Motierre! I am here to exact payment, in blood! You will... eh? Who is this?"
Francois Motierre: "Oh no! What am I to do! An underworld enforcer and a Dark Brotherhood assassin, both here to kill poor Francois!"
Hides-His-Heart: "The Dark Brotherhood? Oh, you have been a naughty boy, Motierre, haven't you? Stand aside, assassin! Motierre is mine! My employers demand it!"
Francois Motierre: "*Gasp* What's this? Oh, Dark Brotherhood assassin, please don't cut me with that wicked blade! It looks like this is the end of poor Francois!"
Hides-His-Heart: "We'll see who gets to cut you, Motierre! Let me show you how a real killer operates, you Dark Brotherhood mongrel! Defend yourself!"
Francois Motierre: "Oh! Oh look! My goodness... Two people here to confront me! Whatever shall I do?"
- "So, you are here to kill Motierre, eh? Well he's mine, and nothing will stand in my way!"