Space Runaway Ideon: Be Invoked (1982) on Netflix

Plot summary

The crew of the Solo Ship has spent years at war with the Buff Clan and on the run from them. The ship carries the Ideon, a mysterious robot with supernatural power and the crew's major weapon. The Buff Clan is building the Ganda Rowa, a warship that may be stronger than the Ideon. Karala, once of the Buff Clan and now among the Solo crew, discovers that she is pregnant. She believes the child is a messiah who can end the conflict between the two factions. The same child gives the Ideon more power, and the war between the two sides escalates further.