Maron is Krillin's girlfriend for a brief time.
She was Krillin's girlfriend during the Garlic Junior Saga, only making a brief appearance in the Android Saga (as his ex-girlfirend tying to get him back) before disappearing from the series altogether.
Maron was an attractive yet air headed young girl, who's flirtatious nature not only infuriated the woman around her (namely Chi Chi and Bulma) but ultimately ended her relation with Krillin, and distracted from attempting to rekindle their romance, in her later appearance mentioned.
Maron slightly resembles Bulma, and she was very physically fit and attractive, she attracted the attention of many men, and Krillin did not like this, he especially did not like to see Maron flirt with other guys. Maron was a minor character, and after the break up she does not reappear in the series.