No, she is not particularly good at supporting anything, and for the most part is pretty selfish. 2nd skill doesn't bring that much support to the table, unless you plan specifically around it.
Her damage at NP1 is ok, but still a little low, particularly if you have Bikini Jeanne.
NP5 against anything remotely divine melts Gods though, and even at NP1, damage is up there. Nobukatsu bringing the overcharge will make her even more destructive.
And with her turning the field into fire, her subsequent NPs get more powerful.
I'd like the second ascension more if it had red hair. But the outfit is fire.