英語圏の作品で似たニュアンスを探すなら、『The Little Prince』の主人公の描写が近いかもしれない。子供らしい純粋さと、大人たちの世界に対する無理解が共存している点で。ただし文化背景の違いもあって、完全に一致する単語はないのが難しいところ。文脈によっては『guileless』や『artless』といった少し古風な単語の方がしっくりくる場合もある。
There's something fascinating about how languages capture personality traits. When it comes to describing someone stubborn in English, 'hard-headed' immediately comes to mind - it paints this vivid image of someone literally having a tough skull that won't let ideas penetrate. But digging deeper, I've noticed 'pig-headed' carries more negative connotations, suggesting irrational stubbornness, while 'strong-willed' can actually be a compliment.
What's interesting is how these phrases evolve from cultural contexts. 'Stubborn as a mule' references the animal's notorious refusal to move, whereas 'dyed-in-the-wool' originally described fabric coloring but now implies unchangeable traits. The nuances matter - you wouldn't call your determined grandmother 'bullheaded,' but might affectionately say she's 'set in her ways.' Language mirrors how we perceive inflexibility, sometimes as admirable persistence, other times as frustrating obstinacy.