That would be amazing.
Fanatic can sometimes fall in teh same range as Nightmist, because a lot of her power comes from Sacrificing her own Hp. if your stingy with your Hp you loose a lot of power with her, which can be difficult for younger ones to realize. but she is a blast too.
If your wife is anything like mine she'll head straight for Fanatic and never look back. Although Tempest is also a good choice.
Maybe they have Young Legacy in Vengeance who knows. Since I doubt they will introduce the Vengeful Five and not have the matching nemesis Heroes. (I mean they could create another Legacy Deck or just make a more mature Young Legacy deck) 
Edit: Vengeful Five not Vengeance Five.
Fanatic is definitely a popular hero amongst the girls in my group, though they're around 19-21. Still, I'd offer her Fanatic and/or Nightmist (the other popular one).
Nightmist is pure Caviar, a good choice for the wife. Basically she can do anything, but needs a little luck/skill to be effective. That said she has a tendency to outlive other heroes, despite the idea that she harms herself a lot.
Maybe "dad" should play a female character too, because there are plenty of cool female characters to go around.
Tachyon is easily one of my absolute favorites. And we're both blondes that like pretty ladies. It's a match made in Heaven.
Tempest is a great character with a beautiful backstory, so I recommend him/her regardless of gender. I think I could say that about any of the heroes in this game, to be honest.
Is your wife into stories? I suggest you do with her what we do in our group when new people get into the game: Hand her the rulebook and point her to the bios. If she's curious about how the character plays, there is plenty of info here. I just know that a lot of the fun I had was understanding the characters on a thematic level and seeing how their mechanics reflected that.
March is possible, but in case you don't know, May is the announced date. Don't want anyone to be dissappointed if we don't get things in March, just pleasantly surprised if we do.
My wife likes tachyon (her favorite) and is not particularly fond of Fanatic from what I can tell. Which is weird I guess, cause I love Fanatic and am not particularly fond of Tachyon.... In Fanatic's case, you don't *have* to sacrifice her HP to be effective. I don't (or do it only in rare instances) and I feel she plays pretty well. Even though it seems almost "suggested" that you play her that way, in my experience she plays better if you ignore the self-mutilation aspect.
Personal preferences aside, I would reccommend almost any hero.. Maybe not Absolute Zero to a child, but other than that, they should have fun playing any of them. Different people have different preferences, so I'm a fan of the "pick the hero that you feel looks the coolest" approach. Looks matter a lot to a kid, heck they matter a lot to *me* (gosh I'm so shallow when it comes to games). Chances are that if your daughter likes what she sees in the pictures, she's going to like the character, no matter how their deck plays.
Case in point: my first game I picked Tempest on the basis of "he looks awesome" and many games and 2 expansions later he's still probably my favorite. My other favorite is Fanatic, who, incidentally, was my second choice of hero in the first game (in case somebody else wanted Tempest).
My wife's favorite character is Haka :)
LoL you are correct May. I knew that. No worries.
I almost suggested Haka for his daughter if she wants to play a guy… he is just a big fun bull in a china shop.
Of the core set characters, I think Tachyon would be my bet for female character for a 7 year old to play. Her complexity is turn based, and doesn't require set up over multiple turns (like the Wraith). While Fanatic is awesome, she reuqires you to use your HP and that's hard for a lot of adults, let alone kids. Visionary is clearly awesome, but pretty complex for a kid. Young Legacy is also a good choice, but the point was made that all of her cards have "Dad" Legacy on them which would less fun for a kid.
If we're not confined to the core set, I think Unity is a good second choice thematically (pink, pets, etc) but not being able to play golems and needing to remember a lot of strat of turn/end of turn effects is a little complicated for a 7 year old.
As for your wife, all of the female characters are BA. I guess it just depends on her prefered play style. Not knowing her, I would recommend The Wraith - very versatile character (does a lot of damage, control, some healing, etc), she feels like Batman which is a very well known and comfortable pop culture trope, and, though there is strategy involved, she's simple enough to get sucked in and start reading her flavor text, etc.
I say that in that game, you should play Fanatic or Expatriette and then fight Citizen Dawn. I get a feeling your 7 year old will like Citizen Summer et al.
Hi all,
Just thought I would give an update. First of all this game is awesome. I have greatly enjoyed playing solo and with my daughter.
My wife has played a few times, but she says the game is not for her.
The first try with my daughter, wife, and I was a disaster. To many distractions, my wife not likening it, my daughter wandering around, I was afraid it was a bust.
But after that it has been great. Usually my daughter plays one character and I play two.
Charecters she likes: All of the girls, but Visionary is her favorite.
She is always asking to play, and she likes picking the heroes, the villain, and the environment.
Some observations:
I can't handle 4 heroes solo. I have tried, but it is to difficult for me. When, my daughter plays I need to keep the entire game state going, so we still play with just 3 heroes.
Omnitorn is tough. My record against him is like 3-4. Perhaps I have been unlucky, but he is a lot harder then Baron Blade for me. We are like 5-0 against Baron Blade.
We have beaten every Villan at least once except the Matriarch and the Ennead.
The game works well for stoping in the middle. When it is bedtime or dinner we just leave it out and continue latter.
Thanks to all. We have had a blast!
So happy to hear that you like it! I'm glad your daughter likes it, too. The Matriarch and The Ennead are mighty opponents, so it's definitely understandable that you're having trouble. Visionary is great against Omnitron (Wrest the Mind on an Electropulse Explosive is VERY satisfying), and deck manipulation can GREATLY improve your chances against it.
If you're having trouble soloing four heroes, I recommend downloading Mezike's spreadsheet. If you have a laptop, you can keep track of HP for the heroes and the villain on it, and have less stuff overall to fuss with.
My girlfriend's favorite characters to play are Wraith and Fanatic, in that order. I don't know about you, but she hates it when she feels like she's not contributing to the damage total. Those two have been her go-to good gals.
I have also played with a friend's younger sister(s), and they seemed to favor Fanatic and Tachyon. Nothing too fancy, but able to really do some damage and fun to work with. Hope this helps! :)
I think Tachyon can mechanically be confusing for a child, but I could see a child loving her personality and sense of humor.