Mel works as Valentina Allegra DeFontaine's assistant.

She sees all that's wrong with Valentina but she keeps her mouth shut.

She sees how manipulative her boss is but she keeps her mouth shut.

She's just a nice girl, she doesn't wanna work for the bad guy, she just wants to work, and feel important.

In dire situation she can use weapons but she's mostly quiet, on the sidelines.

Since Valentina announced The New Avengers, she's relieved to know she's working for SOME Avengers now.