•ChunJieXing - 纯洁性 ：means Purity.
Chun Jie is Pure, but I would just Jie Xing most of the time because Chun should be a last name.
•TieXin - 铁心 ：means Iron core. I would translate in google as Iron Heart it's the same so I prefer as Heart not core.
Any other character's name doesn't have meaning because I just put it without thinking and it's not important.
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~Edited~