Sinead ran away from home and had various dramas with on-off boyfriend Bart McQueen (Jonny Clarke) last year, but has so far had a quieter 2012.
Davis told PA: "I'd like to see things get a bit more gritty for Sinead, maybe see her get in a bit more trouble than she's usually in.
"She's a bit goody two shoes now. I want her to get back being chavvy and Scouse again and get really naughty."
The 19-year-old added that her real-life family members were the real winners when glamour girl Mitzeee Minniver (Rachel Shenton) recently gave Sinead a makeover.
Davis said: "She got remade by Mitzeee so all my clothes were got rid of. They were like, 'Shall we throw them in the bin?' I was like, 'No, I'll keep them all for myself!'
"They're all designer, Topshop, I went home with two big bin bags and I gave them all to my cousins and my family."
Hollyoaks airs weeknights at 6.30pm on Channel 4 with a first look screening at 7pm on E4.