For trivia pertaining to this monster's Number, see Forum:"Numbers" Xyz Monster Trivia. Any contributions regarding this type of trivia should be placed there, instead of this page.
- This card is the Cover Card of Number Hunters alongside "Number 63: Shamoji Soldier" and "Night Papilloperative".
- Reflecting this card's name, this "Number's" sealed form is of a human heart with two root-like arteries coming out of it.
- In addition, when this monster uses its effect in the anime (restoring it's owner's Life Points to 100 when they hit zero), it is shown as an electric shock which this monster shoots at it's user to resuscitate them– like an AED– with a heartbeat sound effect to emphasize.
- In the anime, this monster is based on Alito in his past life as a powerful warrior who fought using only his bare hands.
- This card has a heart shape ornament on its chest, belt and shoulder pads using this card name Heart, including its large amount of hair resembling a lion's mane.
- This card's name could be based on Richard I of England who was also known as Lionheart. Further evidence to support this is the fact that this card is a Warrior-Type.