Great analysis dear and will definitely tag you going ahead!!
You are right she might be a brat or a grey shade but to what extent does she have a hold on Anuj is yet to be witnessed so am just taking it one episode at a time. Will he be as blind spotted as Anu was for her family..will he allow Malvika to disrespect Anu and let her get away with it? All these are open ended questions which we just need to wait and watch.
Regarding the water washing away the tattoo, I also feel Anu will not doubt him as in lose trust in him..they are way beyond that but I also feel it indicates its not yet time for her confession coz she still has to know him and his world just like he did. Its going to be roller coaster we just need to hang in there😋