
Heartless bitch is a bit too much...
She is a sad case to be precise.. She was filled with anger and hate!! Do not expect someone like that to think rational enough..
On Tia's case... She was framed.. She coudl get angry but her being stripped off from her position so quickly..
Made her have FEAR and TRAUMA and not hate..
Different people adapts different to various situations and we have no right to be judgemental with that.. All we could do is to pray for them

Nah heartless bitch is exactly what she is. Tia did nothing to her but she came back with the intent to kill her. JUST BECAUSE she was being compared to her AFTER Tia was wrongfully EXECUTED. Julien was a complete waste who made no efforts to learn about the Empire or do her Empress duty because Tia was busy cleaning up after her. If she had only came back to fuck shit up with Zena and the Aristoshitheads then i would agree that it would be too much. HOWEVER the fact that she came and included Tia into the mix definitely made her a heartless bitch.

Guess.. We will not agree on this.. This is my take.. I just read spoilers on this..
If Jieun is heartless bitch.. Then Tia is also a bitch, cold one to be exact.... Cause she is the inheriting crown princess and empress but she just obeyed the court ruling over Jieun to be executed, cause deep inside... she hated Jieun as well and she is willing to let Jieun die but her redemption made her rethink that.....
The author just let Jieun reveal everything at the cell and Tia realise that they are just the same but their input is just different; and Tia's mercy on Jieun is to make her choose.. Jieun will drink poison or potion to make her dead.... .. For someone who saved your life and gave you powers... Is that how should you give thanks?? Make her choose??
So.. Both of them hate each other... It is both ways.
And spoilers... She came back to fuck up the aristrocrats especially the duke who fooled her and the prince.. With Tia.. It is just pure hate.. And Tia could say that to Jieun as well.. They both hated each other... So no way in second life they will work together

You read spoilers and I read the light novel. Julien tried to kill Tia in the second phase. She tried came back to hurt Tia when Tia did her absolute NOTHING in their past life. Tia did nothing but cleaned up after her useless ass. She could have learned to do her empress duty however she did not. The only person who deserved to die was Duke Zeke since he is the one who killed Julien and her child after he had no use for her. Julien is a heartless bitch. If i were to try and kill you would you be willing to fight against the court for me? Keep in mind that I was the one who poison you but had a change of heart magically. I'm trying to hurt you despite knowing how pitiful your life was before and also experiencing it for myself after you die. I never once sympathize with you or think "hey maybe I should leave this person alone because they didn't do anything to me but they still suffered because of me. I knew she was in love with the prince and I ended taking him from her and despite being the empress I'm completely useless and she does EVERYTHING I find troublesome for me." Nope all she thought was "oh everyone loved Tia and everyone missed her after she died so let me go and try to make her life miserable and oh hey why not poison her for the fun of it too"

It's cool. Yeah she tried to poison her or successfully poisoned her then realised that she was the villain in this life so asked God to bring her back. After all that Tia gave Julien the option to either drink a poison that will kill her or drink a fake poison that will make her seem dead so she can then escape. Read the manga a while back so forget some details.
One thing that I absolutely hate about this manhua(among MANY if not all of it) is that Jiun got a chance at redemption too but she chose wrong...tia chose not revenge but to live a quiet life and to become happy regardless of the prince and jeun's fate. She didn't care about her coming back..she was infact waiting for jiun to come back so that she could pass her title and live freely
But Jeun chose revenge instead of her family!! She goes moaning about how alone she is and how much she missed her family and she then chooses revenge OVER them!!
I seriously pity her parents for giving birth to such a heartless bitch.