The actress's character Denise Fox returns to the forefront of the soap next week as she becomes embroiled in the ongoing Yusef Khan (Ace Bhatti) storyline.
When Denise discovers Yusef's abuse of her friend Zainab Masood (Nina Wadia), she joins forces with Masood Ahmed (Nitin Ganatra) in an attempt to rescue her.
Parish told BBC Breakfast today: "That's fantastic, because we get to move around the Square and be involved in all of the characters' different situations. The fact that Denise is a very good friend of Zainab's, that kicks her into another mode.
"It's usually Denise that's on the wrong side of the trouble! But this time, she sort of comes to the rescue a little bit with Zainab. And then by Christmas, she starts having her problems again!"
Discussing Denise's involvement in Zainab's story, she continued: "You can still have the angst - it's just on someone else's behalf. Sometimes it's just a different angle of taking your story. There's so many different textures to this show and so many different ways to be involved. And being involved in Christmas is very, very exciting. It's going to be a great one, actually."
Denise is also expected to take centre stage in her own right over the festive period as Phil Mitchell's ongoing stalker drama forces her to revisit her past.
Asked whether there is a competition between the soaps at Christmas, Parish replied: "Oh, of course there is - it wouldn't be any fun if there wasn't a competition, and it's great.
"I mean, I hope people do tune in. You'll be missing out if you don't! It's a fantastic couple of episodes that we've got this Christmas, and the run-up to Christmas as well next week."
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Watch Denise's EastEnders character trail below: