Sucrose had requested Timaeus to meet her in Mondstadt City late one night. She hadn't explained why, only that she had wanted to "talk" to her fellow apprentice. The young man does as she had asked and goes to the meeting spot in a secluded spot of the city, a place that is usually pretty empty during night. The moon shines brightly overhead in the night sky as he eagerly waits for the beast girl. Fortunately, he doesn't need to wait long before she arrives, smiling as she approaches him.

"Hello, dear Timaeus. I see you had come! That's very kind of you~" Sucrose greets.

She gets closer to him.

"Let's have a nice talk just between us two..." Sucrose says.

Timaeus finds his fellow apprentice's attitude odd, but he doesn't pay attention to it, trusting her completely. He looks at Sucrose with a warm smile.

Timaeus: Of course! Have you wanted to speak to me about something important, or a new experiment? I am always glad to hear the news because I can't wait to see what you will create!" Timaeus says.

Without responding to his question, she grabs the young alchemist's chin.

"My, my... you are a very handsome young man, you know..." Sucrose says.

She pulls him closer to her, her amber eyes glowing in the dim light of the night. She's smiling, but it feels wrong... like it is a fake, twisted version of her actual smile. Something inside Timaeus tells him to run away from there, to get away from Sucrose, but he silently brushes it off, knowing that Sucrose is of no danger to him.

"What a wonderful compliment, thank you very much." Timaeus says.

Sucrose approaches him with that smirk on her face, secretly reaching behind her back to pull out a rather wide needle. Close up, her eyes are completely empty... nothing but the void stares back at him now...

"I want to give you a gift, Timaeus." Sucrose says.

Her smirk now has the edge of madness to it. Her words are sweet, but her eyes are cold.

"I want to gift you the best of gifts..." Sucrose says.

Before Timaeus can ask Sucrose what she means, he suddenly feels a sharp pain in his chest as she directs the needle to his chest. In an instant, he feels his body going limp. As he collapses, he looks up at Sucrose in shock. She is no longer smiling, her true face revealed by the moonlight. Her eyes are cruel, her expression full of hatred. He coughs out blood as he stares up at his fellow "apprentice" in shock and disbelief. The pain in his chest is unbearable. He can't speak easily, but he somehow manages to grab Sucrose's arm.

"Wh-What.. what is... what is this? W-Why...? It... cough cough ... it hurts!" Timaeus asks weakly.

He looks into her eyes, trying to understand what is going on. Her cruel gaze and words only made him scared, making his heart feel like his chest is on fire from pain. Sucrose keeps her gaze locked onto his eyes, her smirk returning to a sickening sweetness as she gently strokes his hair. Her expression is still cruel, but with the touch... almost mocking, as if she feels amused. She takes a step back, looking down at Timaeus now lying in a pool of his own blood, as if she is observing a science experiment. She is silent, as if she is waiting for his next move, but then she starts giggling... giggling from the fun she's had and watching him suffer. It was a pity that he has to die. Despite Sucrose's subconscious attempts at grooming Timaeus to try and get him to lose his faith in Mondstadt and abandon it like she's had far more success with Jean on, he just seems to be too loyal to those stupid Knights of Favonius and this weak nation. Sucrose bends down and smiles, sliding the blade slowly out of Timaeus's chest. The man's eyes grow wider and wider, his mouth gaping with shock and pain. With his labored breath, he mutters words that will be the last he'll ever say.*

"Why... Why would you do such a thing? What... did I do?" Timaeus asks.

Unable to move, he can only watch Sucrose take joy in his suffering, not uttering a word in response to the bleeding man's pleas. Her sick smile shows her utter lack of empathy as he passes, watching his corpse coldly in the moonlight. The man that was once full of life is still now, as if he is just a toy that was broken and thrown away. His body is now lifeless, but his eyes still show his great fear, even after he departed to the unknown. Sucrose stands there silently, looking down at Timaeus and the blood-soaked needle in her hands. In the end, he meant nothing to her and only served as a tool. She spends the next few minutes expertly setting his corpse up to make it look like to the Knights of Favonius and other Mondstadtians that he had killed himself, wanting to put up this charade of her "sweetness" with them just a bit longer. Sucrose does her work fast and thoroughly, moving his body so that her blade won't stick out of his chest. She takes a bit longer to place his dagger in his hand, making sure to put it in a way that looks like he had stabbed himself. When she's done, everything is arranged so thoroughly that it's no longer obvious who is to blame for this cruel crime. His body lays there, dead. His eyes still open, with fear engraved in them, as if he couldn't believe that he had no chance to defend himself against her. She takes a minute to adjust his expression with her fingers, making it look more lazily, before taking a step back to finally admire her work. She looks at the dead man, with a twisted grin still on her face. She can feel a sense of pride in her actions, satisfied with what she has done and how she left the body. Even in death, he's still staring at her in a horrified shock, his eyes begging her for help, as if he was unable to believe he was killed by her.

The next morning, Sucrose leaves her and Albedo's lab to see a crowd having gathered around Timaeus's corpse, murmuring among themselves at the shocking "suicide". She approaches the body, acting shocked and grieving. She puts on a perfect act as the other knights come to check on the body, as well. Everyone seems confused, as this was an otherwise healthy scholar who had no reason to commit suicide. Everyone is grieving. Sucrose's act is so perfect, no sign of a lie can be detected. No one can suspect her or even think that she has anything to do with this. As the news of Timaeus' death spreads throughout Mondstadt, the people are left in shock. The news is all over the city, spreading like a wildfire. A sudden tragedy has struck Mondstadt, with the death of such a valuable and important employee of the Knights of Favonius. Even the Knights of Favonius themselves can not believe what has happened, as they saw Timaeus as a close colleague who was always a hard worker and helped them in their research. The Knights are left sad over the passing away of such a wonderful and diligent person, who worked tirelessly for the good of Mondstadt.

Albedo takes some time off from his duties to the Knights of Favonius to mourn his apprentice's death and he tells Sucrose to take some time for herself as well for a bit. Sucrose goes to the cathedral in the city to mourn Timaeus' loss, appearing completely heartbroken and in tears. She is able to convince even Jean, despite her having been friends with him, that she had nothing to do with this tragedy. Sucrose has even planned out how she would mourn his death in front of the people, everything to make sure she would come off as innocent and without suspicion. Of course, while she is disappointed he was too loyal to Mondstadt for her to corrupt and therefore had to die for her mission to continue, she's not truly sad or mourning. Not really.

Sucrose is truly an amazing actress. She looks grief-stricken at Timaeus' funeral, making sure to make everyone around her sad as well. She uses every opportunity to remind everyone how "close" she was with him, how he helped with many research projects, and how he was there to support her whenever she needed. She puts her acting skills to great use, making sure to put on the biggest display of grief she possibly can. If anything, it's a bit too much... which is only a small concern, considering no one even suspects her anyway. Many are taken aback by her being seemingly too intense, but they brush it off as her just having been too close to Timaeus. Even Jean, the one who knew Timaeus the best, can not tell if some of the grief is fake... but she comes off as believable and that's what matters. She even got a few tears out of Sucrose.

Sucrose acts like a perfect, broken innocent, and no one will suspect her of anything...