On the subject of jujus, didn't the kids alchemize Callie and caliborns lollipop jujus? So they can be alchemize. Still doesn't mean the unbreakable katana is a juju though.

They aren’t so much alchemized as teleported tho. When Jane put in the codes, the Cali twins’ jujus disappeared.  And the katakana didn’t disappear when another was formed so it’s not a juju.