A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
It´s clear that a personality that can remain bowed due to the effect of any card you own doesn´t necessary have to unbow due effects of your cards or during your straighnten. But what happens when another player effect unbows that target personality, he unbows or he can remain bowed?
as example: a personality with a soul jar is bowed and another player plays ring of air targeting that bowed personality
It´s clear that a personality that can remain bowed due to the effect of any card you own doesn´t necessary have to unbow due effects of your cards or during your straighnten. But what happens when another player effect unbows that target personality, he unbows or he can remain bowed?
as example: a personality with a soul jar is bowed and another player plays ring of air targeting that bowed personality
http://rules.l5r.com/Glossary_M#May_remain_bowed: "(W)hile the card is bowed, its controller may negate any effect that straightens the card" (emphasis added).