Lust can be for anything iirc, not just sexual gratification. If I'm not mistaken, Lust is nothing more than an extreme desire. I don't really think Lust refers specifically to sexual gratification, even in the context of the deadly sins, does it?
Now, in that regard, I can't really think of anything that Henry would fall under. xD He's carefree, so he doesn't really have any kind of special desires to lust or be greedy for or be envious of anything, he's probably the exact opposite of wrathful, he's not a sloth by any means, nor does he actually have any real pride to speak of...I really don't think he fits any of them.
@forsythe - Actually, Greed must be about material possessions, if I'm not mistaken. That's what separates it from Lust.
Lust is the intense desire. Greed is about desiring material possessions in excess. Envy is about jealousy and the intense desire to own what another possesses. They're all extremely similar as they are all a strong internal desire, but there are slight differences between them.
I understand the point of a Sin Crest would be to overcome that internal sin and/or admit that they have it. But I really don't feel like that's a concept for a protagonist to utilize. I feel like that should be reserved for what I always called "Dark Tamers" in my RP's that involve them (although their Crests don't HAVE to be sins, they make a good start for consideration).