Is it weird we became instant best friends despite our differences?

This new girl started like a month or so at my place and I only trained her a day but after few days we instantly became very good friends as if we new each other long time ago is that weird? Many people at work are like what do you and her have in common she’s Philippine and I’m from Europe, I wasn’t specifically looking to make any friends tbh it just happened. Can you explain how?

Is it weird we became instant best friends despite our differences?
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