Ryu

Ryu is notably quiet and reserved, finding social interactions somewhat challenging.

Despite being Shirayuki's technical superior, he is younger than her, which leads him to address her with the polite honorific "-san."

Shirayuki, in turn, calls him by his first name, Ryu, but always pairs it with respectful speech.

He became famous in pharmacological circles at the incredibly young age of 10, when Garak first scouted him and brought him into the castle.

He is also known for producing handwritten pharmacology texts, a testament to his deep and personal engagement with his field.

Ryu spends nearly every waking moment in pursuit of pharmaceutical and botanical knowledge.

His physical stamina is quite poor, a likely side effect of his intensely sedentary research lifestyle.

When he is focused on a task, his concentration is so absolute that he often won't notice someone speaking to him.

The moment that laser focus inevitably breaks, he has a habit of falling asleep without any warning, often found curled up under his desk.

He has a fondness for oversized sheets of paper for reading and writing.

His posture while working at his desk is terrible, but surprisingly, his eyesight remains exceptionally sharp.

His extensive knowledge of plant-based poisons has occasionally caused others to cast suspicion on him.

Together with Shirayuki, he later takes on a dual role as both a pharmacist and a research fellow in Lilias.

There, he dedicates his efforts to the study of the Olin Maris plant.

Izana Wisteria has already extended him a formal notice of a future transfer, indicating he is slated to lead the pharmacy at Wilant Castle.