Retweetedearlier by Falcom and originally tweeted from the Ao no Kiseki Evolution account. The above photo is a test fitting of one of a possibly upcoming official costume of Rixia. Also mentioned in the tweet is an official costume for Noel as well.
No information on who is making the costumes- but looking into past interactions, it may be COSPA as they did the Alisa Thor’s uniform costume.
I’ll keep an eye open for more details on this.