Why does 哆啦A梦 use an alphabet instead of an equivalent Chinese character? Doraemon is represented as 哆啦A梦 in Chinese. It includes an alphabet ‘A’.

But I wonder why it uses the alphabet. Why not simply use a word equivalent for ‘A’, such as:


  哆啦欸梦


I haven’t seen such words, that use an alphabet instead of Chinese characters. Is this an exception or common among foreign loanwords?

And why does 哆啦A梦 use the alphabet to begin with?
Why is the use of Chinese characters and letters mixed in the rare translation of Doraemon? This is a set of katakana and hiragana shuffling from the original text. 

So, why is the original name of the original text half of the katakana (ドラ) half of the hiragana (えもん)? According to Fang Kuangyang's second book, "Encyclopedic Encyclopedia (Supervisor/ Fujiko Fujio)", Volume 1, page 107, the names of the original Doraemon were all written in katakana (ドラエモン), but they were finished in the factory. When the robot was registered, Doraemon finished writing the first part of the name and couldn't remember how to write the katakana in the latter part (it really was a bad product (-_-;)) and had to write hiragana. 

Hey. So Doraemon's name is half a half of a pseudonym and half a pseudonym. The translation of the Chinese version of "Dream A Dream" uses half a half Chinese characters, which actually reflects this setting very faithfully.