Why does Ayaka Ohashi have the nickname "Hego-chin"? Ayaka Ohashi is a Japanese voice actress (seiyu). She has nicknames such as &quot;Hasshī&quot; and &quot;Hego-chin&quot;.
The word &quot;Hasshī &quot; is thought to be derived from her family name &quot;Ohashi&quot; .
However, there is no character anywhere in her name that could be the source of the sound &quot;Hego-chin&quot;.
These days, she's known as &quot;Hego&quot;. &quot;Hego&quot; is probably a shortened version of &quot;Hego-chin&quot;.

Why does Ayaka Ohashi have the nickname &quot;Hegochin&quot;?
Her Japanese Wiki page tells us the origin of that nickname:

愛称
愛称の一つである「へごちん」は、2013年にweb番組『五十嵐裕美のチャンネルはオープンソースでっ！』にゲスト出演した際、「頭へ ゴチン」を「頭を ヘゴチン」と読み間違えたことが由来。さらに省略されて「へご」とも呼ばれるようになった。

My translation and my explanation in the parentheses:

Nickname
One of her nicknames &quot;Hego-chin&quot; came from an incident that took place in 2013 when Ohashi made a guest appearance in Igarashi Hiromi (another Japanese voice actress)'s web series Igarashi Hiromi's Channel is Open Source! In the show Ohashi misspoke and mistakenly said &quot;hegochin the head&quot; (which is nonsensical) where she should've said &quot;gochin to the head&quot;. She has also been called &quot;Hego&quot;, a shorter version of &quot;Hego-chin&quot;.

「ゴチン」(gochin) is an onomatopoeic word that describes the sound of a large object hitting someone's head. 「頭へゴチン」means to use something to hit the head in the fashion of &quot;gochin&quot;. Here 「へ」is a particle indicating direction. The kana is usually pronounced &quot;he&quot; in words, but as a particle it should be pronounced &quot;e&quot;. So the correct reading of that phrase was &quot;atama e gochin&quot;, but Ohashi thought 「へゴチン」 was all together a word, so she pronounced it as &quot;hegochin&quot;. Another tricky thing that led to her mistake was the hiragana 「へ」 and its katakana 「ヘ」 look alike.