Shizuka

Shizuka is the manager of Cartridge Freak, a hunter's supply store. She meets Akira while he's trying to buy a replacement for his pistol and beatup rifle, taking a shine to the young hunter in the process.

Personality
She is a kind, compassionate woman who looks out for her customers, throwing in some free (if outdated and unsellable) gear for Akira, seeing how young he is. She is also the first person besides Alpha to worry about him, but does so without any strings attached, only hoping that he makes it back alive (and continues to be a regular at her store).

Intuition
Shizuka's years of experience running a supply shop has allowed her to develop a skill for reading people's emotions and being able to manipulate the flow of conversation. Her intuition is so fine that she is practically never wrong when judging a person or their actions.

Akira
At first Shizuka sees Akira as a poor boy, just starting in the world of relic hunting, and therefore a potential long-term client. As the series progresses, her feelings for Akira grow to the point of considering him like a little brother. Shizuka tends to get angry with Akira if he pulls risky stunts. This reaction is born from the affection and concern that Shizuka has for Akira. She usually hugs him after he returns from a dangerous mission.

For his part, Akira has inadvertently developed a strong attachment to Shizuka, to the point of mercilessly murdering anyone who even thinks of hurting her.

Elena and Sara
Elena and Sara are regular clients of Shizuka, as well as her good friends. Shizuka advises them on all kinds of subjects, and they both trust Shizuka's judgement.

Trivia

 * Thanks to her intuition, Shizuka was able to discern all the difficulties and suffering Akira went through. This has led her to be the person who knows Akira best.
 * Shizuka's intuition is so accurate that she even managed to guess that Akira can connect to the old world domain.