 If you liked
Dimension W
|
 ...then you might like
Kikaijikake no Merdina
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While the premises of both series are not alike, they do involve technology in particular with robotics. The main female character also has a strong personality that is evident from the beginning. Throughout their story, they develop unique relationships with other characters. There's also a decent amount of sci-fi mechanics that are explored as we learn more about their worlds.