The Ronin

Card Type: Personality
Force: 9
Chi: 7
Honor Requirement: -
Gold Cost: 15
Personal Honor: 3
Clan: Unaligned
Keywords: Duelist, Experienced Kaneka, Tactician, Unique, Ronin, Samurai, Shogun
Card Text: Targeting the Ronin has the additional cost, "Pay 10 Gold or discard a Battle Strategy" for other players.
Battle: Bow any number of Rings you control: Give each Personality in the current enemy army -2F for each Ring you bowed.
Legality: Age of Enlightenment (Lotus)
Deck: Dynasty

Printings

Q: Consider I overlay a Monk via Waystation of the Path
onto a Ronin generated by Recruitment Officer
Is removing the Ronin either a "ongoing effect" (I'd say "no", as it looks like a "delayed instantaneous effect") a "reference" (I'd also say "no" as I think this means explicit references in abilities like "he bowes to:") to the Card that is inhereted by him through:
All in one simple question: Is my Henshin removed at the end of the turn, if he overlayed a Recruitment Officer Token?
A: In this case you're right that it's a delayed instantaneous effect, however, that is part of the game state of the overlaid card, which will be inherited by the new card. So your Henshin will be removed from game at the end of the turn. Jon Palmer, "Overlaying: Waystation of the Path + Recruitment Officer", 19 Feb 2012
Q: And does any of this change if the Ronin is the ONLY legal target compared to if there are non-ronin targets.
A: That one is easier, because as in your link, paying the cost would then be known to be impossible and announcing the action would definitely be illegal. Again, if your opponent does announce it by "mistake" in this case, that's between you, him, and possibly a tournament judge. Brook Cunningham, "Hida's Guidance and The Badgers Live", 27 Apr 2010