Backstory
Since Guirec was born, they prefered to have their own autonomy for their sisters' sakes. When they were a baby, Elodie's grandfather took care of them among the others, but had passed by the time that Guirec could comfortably walk and talk. Guirec couldn't remember his voice, but recognized his face from memories and pictures around the house. They also grew up remembering the grief their sisters went through without him around.
More siblings were on the way, Taimi and Milne. Paavo was the last to sprout at the time, growing up a bit slower than Guirec had, proof that each one in succession was more human like in aging. Each of their sisters eventually sprouted things like flowers, blossoms, but Guirec sprouted mushrooms. At first, Guirec hated that it wasn't anything "beautiful", and why their creator chose to make them have such a makeup, and why he'd passed away so soon into their lives. Questioning so many things, that sparked their interest in science to figure out things themselves.
Guirec spent a lot of time reading, studying on their own to learn more about their biologies through their grandfather's notes. It was interesting, a passion to them, but being a wuiet and studious child would mean less work for their siblings. Part of their maturity is a downplay of their problems compared to the responsibilities their sisters carried, yet they'd heard them mention it was temporary; Elodie was going to care for them in the future.
Dubious, Guirec thought it'd be tough to have someone new in the family, some stranger they'd have to consider a parent. It'd be good when their other siblings are born, when their sisters need help, but they figured they wouldn't grow attached. Elodie turned out to be a kind person though, attentive enough that even she noticed the things Guirec needed someone to be around for. Some experiments couldn't be praised if their sisters were busy, or sometimes Guirec needed someone else to speak with for advice.
With the sprouting of Milne being the last, Guirec felt the family was large enough as it was. Being able to go out into the world with the others whenever they pleased was nice to do, but Guirec always preferred being alone in a lab. Even so, with Mandira working at the flower shop, her little brother Veli in tow, Guirec found someone who could study alongside of them. Veli became their best friend, outgoing, but someone likeminded enough to be as intrigued about the mandrakes' biology.
So such days came and went, often repeating where they'd all play or spend time together. Guirec leaves behind a bit of their maturity, living more like any other kid, feeling the turn of events was thanks to Elodie. In addition, they don't feel as insecure about their creation when the others appreciate them and their differences, embracing the qualities Elodie's grandfather gave them. Continuing to study, Guirec intends to become a scientist in the future.