[masaegu]

Alright, first of all Western names like Charlotte can only be written in Katakana. So you don't have to worry about how to write your name in Hiragana.....let alone Kanji.

Charlotte = シャーロット

The 'r' in your name, which is not immediately followed by a vowel is usually transcribed with that bar (ー), and you should remember that that bar exists only in Katakana, not in Hiragana.

I don't want to go off topic, but I see people on this forum asking, "How do you write my name in Kanji?". It is NOT written in Kanji unless it's in one of these three languages: Japanese, Chinese, and Korean.