Jenny Tennyson (Earth 2078-D)

She got the Omnitrix when she got 13 years old,she is half-human and  half-anodine,she is student at the Belwood Highschool and is the daughter of Sand and Carla Tennyson.

Origin Story
She was 13 years old in summer vacation with Jude and Maxette until she found a strange looking meteor in the forest,it automatically jumped on her hand,she transformed accidentally into Diamond Head and almost chopped the whole forest