5-Volt

"9-Volt!! It's past your bedtime!"

- 5-Volt

5-Volt is 9-Volt's mother and makes a few appearances in the WarioWare series. She is never fully seen, but judging from what is seen of her, she is a human like her son. 5-Volt lives along with 9-Volt and presumably his pet Fronk in a house in Diamond City.

5-Volt debuts in WarioWare: Twisted!, where she shouts at 9-Volt to go to bed since he is playing with 18-Volt all day. 5-Volt is seen only from behind and from the knees down. After 9-Volt has gone to bed, he still furtively plays with his Game Boy Advance SP under the bedspread, but she catches him when she opens his room's door a second time. 5-Volt's silhouette is seen in the doorway.

5-Volt is seen again in WarioWare: Touched! as a silhouette in the Game Over screen of 9-Volt and 18-Volt's stage. She watches her son and his friend eating.