- In the old days, Haruka is active under the name of Watanabe Haruka. After renouncing the former office and becoming the current office, she renamed her name to the current name Haruka Watanabe.
- Haruka's blood type is AB type. Her hobby is collecting the Showa idol photographs. Her special skills is Ballet (11 years), Dance, Y Balance.
- In 2014 she participated in "NEXT Gravure Queen Battle Third Season" hosted by Shiraiza "Young Animals". The targeted person said Taeko of Finger 5.
- In 2015, in the time she selected the series Ultraman X regular. By the way, the toy that she bought for the first time when she was a child was Ultraman's doll.
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