Basically Lin Shi is trying to explain the characters for his name. His surname is 林, which basically means forest. The character uses two 木 symbols (the character for wood), so that's why he says "A forest tree. A double wooded forest...". The Shi in his name is 實, and in the Chinese version, he's trying to say that the 實 in his name is the same character for 果實 (fruit). However, the correct character is 果实 (also pronounced shi, but different character). Hence, XiaoFei says "the fruit is wrong", because it's the wrong character.
Also, when XiaoFei says "Cold type?", I think he refers to his personality as being the more cold, withdrawn type.
Anyways, I'm not really familiar with traditional Chinese because I usually use simplified Chinese but I hope this helps ! ! I'm sorry if my explanation is a bit complicated to understand :')
Hiii your explanation is great! Just popping by to mention 實 is the traditional character for 实. The "fruit is wrong" line in the trad Chinese version is something like "Fruit, he says". Xiaofei just finds it's cute that he's using 果實 (fruit) as the example instead of something like 事實 (truth) ٩(๑❛ᴗ❛๑)۶



I don't if anyone mentioned this yet but for me, 'Hikaru' changing his name to Natsuki may be a trans allegory. He lived under the name of a boy who died, posing and acting as him. Now that he's free, he can finally choose his own name - his own self, free of the shackles of 'Hikaru' . As a trans man myself, it's similar to how I lived as a shadow of my old self for many years, standing in for her, before accepting the true me and going by my chosen name. It's probably more of a headcannon for me, but I just wanted to point that out.
You are so real for this
I wouldn’t doubt it. There’s obvious queer themes and metaphors throughout this story, so it’s not a stretch.