She was always the centre of the group---she was always in the spotlight---an eye catcher?
with which you could near many girls officially, touch them legally ( you mean naturally?)
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1. "Spotlight" is fine. I think that is the word you want to use for someone truly important such as movie star, politicians. My character in the story was popular, in a much smaller magnitude, but not at an elevated level of being in the spotlight. "Eye catcher" is not the word in my mind. Qiao was not a beautiful girl, but she is very lovely and charming kind of girl. You need get really close to her to discover her attractions. Xie was an "eye-catcher".
2. I mean "legally". You don't want to know what might happen if you touched a girl in any other circumstances the way I did in a dance ball. If you want to use "naturally", then what is the case of "unnaturally"?