The translation of "ryoka" has been to words like "drifter" and "wanderer," occasionally "intruder" and is specifically used in Bleach to name those that enter Soul Society without the permission or accompaniment of a shinigami. Daichi is not a ryoka.<br/><br/>The English translation for what Ichigo is has ranged from "substitute" to "representative," with less favorable terms like "fake" "rookie" and "imposter" being likely insults rather than something specific to the situation.