AniList score 58%

Synopsis
Signal, a robot companion built for Nobuhiko, is attacked by Pulse, one the its creator's previous prototypes. Reprogrammed by Dr. Otoi's mysterious rival, Pulse is loaded down with weapons and sent on a mission by Otoi: steal the most recent robot technology, and obliterate anything that gets in his way.
(Source: Anime News Network)
Synopsis and metadata via AniList.
Characters

Signal
Main

Pulse
Main

Nobuhiko Otoi
Main

Masanobu Otoi
Supporting

Chibi Signal
Supporting

AE-1α ELARA
Supporting

Flag
Supporting

Shinnosuke Otoi
Supporting

Chris Sine
Supporting

Minoru Otoi
Supporting

Hoshimaro Umenokoji
Supporting

A Suke
Supporting
If you like Twin Signal
AniList score 58%