"Queenie, my only sister and my best friend. How could you betray me like this. How could you join Grindelwald after all he the crimes and damage he's done," Tina Goldstein thought as tears stream down her face and clenching her fists.
Tina Goldstein tried to understand how Queenie could fall for Grindelwald's "for the greater good" brainwashing and how she failed her sister. Tina always cared and looked out for Queenie after their parents died of dragon pox. Tina and Queenie always have each other until Queenie went into Grindelwald's ring of blue fire and disappeared with Grindelwald, Credence and his followers, leaving a hole in Tina's heart.
She was restless and could not sleep from the haunting memories of Queenie screaming in pain as she walked towards Grindelwald through the ring of blue fire after begging Jacob to go with her for their freedom and disappeared. The more she tried not to think about it, the more frustration and anger she had.
Tina made a mistake of arguing with her sister, disagreeing her secretly seeing and reuniting with Jacob and wanting to marry and have a family with him. Around the same time of finding out about Newt's new relationship with another witch, Leta Lestrange which Tina thought she was his fiancée but she turned out to be the fiancée of Newt's brother, Theseus. Also, Tina stopped talking to her sister and leaving her behind in New York to look for Credence in Paris. If she haven't made those mistakes, her sister would have been here with her now. Tina regretted not pushing Queenie away, abandoning her and not giving her the support she needed.
Tina couldn't stop blaming herself for her sister joining manipulative, Grindelwald. Jacob confided in Tina that it was his fault for rejecting her, refusing to marry her and calling her crazy but Tina told him but it was actually her fault and apologized for not able supportive of their relationship and fearing of Queenie getting into trouble over it due to the fact Jacob was a No-Maj.
During the conversations with Jacob and Newt about Queenie's actions and plans of defeating Grindelwald, Newt told Tina that they will help her and Jacob find Queenie. Tina's eyes brighten up for the first time in a long time. Hope, determination, and a little bit of excitement are now in her eyes but in the back of her mind, Tina couldn't stop thinking about the sadness and anger that her sister must had felt and the look in her eyes before she disappeared. Tina hopes to find her sister and repair their relationship as well as finding Credence and defeating Grindelwald, one of the most dangerous dark wizards of all time. With the help of her friends: Jacob, Newt, Theseus, and Dumbledore gives her the strength she needed to achieve it.