Rachel

An almost lackadaisical sniper, a reclusive demolitionist, and a captain who rarely interferes in one's personal business are the people who make up all of Rachel's team. Even though they all look like there's nothing anyone can do to surprise them, Rachel is often an exception.
She's an exceptionally genuine person who doesn't worry about difficulties once her mind is set on accomplishing something. Her heartfelt inquisitiveness is what made her take the initiative to leave the laboratory and enter the battlefield but also what frequently causes her to experiment and gather data without considering the consequences, like directly tasting something picked up from the ground. The first time Rachel did that in the presence of her teammates, Reika—who was initially indifferent to Rachel joining their team—was totally flabbergasted and questioned whether Rachel was an idiot before smacking her back hard to make her spit it out.
These occurrences resulted in several stomach aches and even warnings like "nobody will carry you to seek treatment if you're really poisoned," but the notion of kicking the bad habit never crossed Rachel's mind. Moreover, it appears that she can truly acquire some information through "taste" that others can't, and her poison tolerance is also much better than others after her body's long-term conditioning. Of course, under her teammates' supervision, she will still carry gastrointestinal medications and antidotes everywhere with her.

When Rachel first joined the B.C.R.L.'s research department, her main research focus was on fuel, and to obtain first-hand information, she applied to partake in a B.C.R.L.'s team's mission. Unfortunately, that turned out to be a grave mistake, as they encountered a mighty Chaos Remain midway through that mission, which resulted in severe casualties. It goes without saying that the horrendous scene back then deeply traumatized Rachel. Things like "If only field surgery can be more expedient" and "If only I can better support my teammates in combat" kept popping up in her head and eventually imprinting themselves there.
After returning to the research lab, Rachel flipped through stacks of field surgery-related technical reports as a bold idea slowly took shape in her mind—"If only I could design a type of multi-purpose device that can simultaneously be used for medical treatment and combat support." But then came the question—how could she get people to quickly learn the ropes of a device with so many functions and which holds various reagents, not to mention make it even more handy? She had no inspiration for a long time until that day, when she accepted an odd-tasting beverage from a salesperson.
All she needed to do was to make the medicines into such colorful bottles as the beverage! Rachel's inspiration hit her like a ton of bricks, so much so that she hurriedly shoved the beverage back into the salesperson's hand and dashed back to the lab. Following some time of research and development, the prototype of "Rainbow Flask" was born, earning many experts' approval and entering the experimentation phase. As for the fact that the bottle of beverage that Rachel abandoned could've actually been redeemed for the grand prize of a railway loop holiday, it's most likely something she will never get to find out anymore.

People tend to find the things that Rachel likes strange; for example, unusual-flavored cakes and drinks, niche movies with complicated filming methods, and medicines with weird colors and unknown usage. However, this doesn't mean that she doesn't understand 'common sense.' On the contrary, it proves she doesn't really mind people's opinions and the standards of what should be orthodox.
Rachel's colleagues in the research department always found her behavior incomprehensible. When she applied to become part of the B.C.R.L. field personnel in order to finalize the Rainbow Flask, she had to continually swap teams due to the inability to get along with her teammates. Nonetheless, she remained determined and ultimately got to where she is now in spite of constantly being viewed as an oddball.
Rachel's first meeting with Ganya has become a core memory of hers, though. It was during a joint mission, and she had been swapped at the last hour to Ganya's team. As per usual, Rachel did as she pleased, showing no concern for others' thoughts. All she cared about was that her invention could be finalized. Yet, when the mission ended, Ganya asked, "Would you like to join our team?"
It had been a long time since Rachel last felt so taken aback. She couldn't help clarifying, "You're being serious?"
"Although your manner of doing things seems really bizarre, I can see that all the decisions you made during combat were basically correct, and you were prompt when it came to supporting others," said Ganya candidly. "But if you join our team, I won't give you free rein either. You will absolutely be stopped if you attempt to do something weird, like eating something that was picked up from the ground."
Ganya recognized Rachel's disposition but also asked that the latter compromise and cooperate at the bare minimum. "You're only working so hard so that anyone could use the Rainbow Flask, no?" Ganya's words reminded Rachel that her invention was meant to help everyone who needed it; it wasn't something that could be achieved by one person through unceasing research.
Rachel's luck had been abnormally good since she was a child to the extent that she, who never failed to win lucky draws, had long become numb to things like winning prizes and having good fortune. On that day, however, she actually felt the kind of exhilaration and delight one would upon "hitting the jackpot."
"Getting to meet Ganya and befriending everybody in Team Meerkat are the most fortunate events in my life." Whenever Rachel says that, Team Meerkat's members will tell her to stop, but it's probably precisely because they know she means it from the bottom of her heart that makes them bashful.