Ruby (Rebecca Breeds) recently had her heart broken by Summer Bay heartthrob Romeo (Luke Mitchell), but is soon to embark on a relationship with Casey (Lincoln Younes) - the younger brother of Charlie's love interest Brax (Steve Peacocke).
However, while Charlie encounters difficulties tempering Ruby's behaviour, Brax lends some unexpectedly helpful advice.
Anderson told TV Week: "Ruby's at that age where she is quite impressionable, and Charlie doesn't want to see her getting hurt. She's only very recently been in a relationship with Romeo, and Charlie is concerned about her moving from one guy to the next too quickly.
"She's not prepared to listen, but Brax does get through to her on some level and I think that surprises her. He offers the first bit of good advice that she's heard in relation to parenting so, as much as she doesn't want to admit it, he does get through."
She said of Charlie and Brax's future: "It's a great struggle for Charlie and Brax, and it shows that you can't choose who you fall for. It's sizzling because they both want one thing, but they can't really go there."