Thank you for the summation! From my own quick search, I found, in the US,:

This article1 directly addresses the question, "If a juvenile rapes an adult, does the adult thereby commit statutory rape?" It concludes: When an adult is raped by a juvenile, the offense of statutory rape imposes criminal liability on the adult for the same intercourse by which the adult is a victim of rape. In this way, the offense of statutory rape criminalizes being raped; it criminalizes being the victim of rape. It criminalizes the failure to prevent or resist being raped by a juvenile. And neither defenses specific to statutory rape nor defenses of general application satisfactorily preclude liability. 1. Christopher, Russell L. and Christopher, Kathryn H. (2012) "The Paradox of Statutory Rape," Indiana Law Journal: Vol. 87: Iss. 2, Article 1.

https://law.stackexchange.com/questions/15018/if-an-adult-is-raped-by-a-minor-is-it-statutory-rape

And:

Juvenile or Youthful Offender? When a minor is accused of a crime, he or she may be tried in either juvenile court or district court. This typically depends upon the severity of the offense. If a minor’s case is handed in the juvenile court system, he or she would not receive a conviction if found guilty, but rather be adjudicated delinquent. As a juvenile delinquent, any time served would be in a juvenile detention facility, and the minor would be released around the time of his or her 18th birthday, if not before. However, some crimes are considered to be more serious, and for those, a finding of delinquency seems too light a penalty. In Oklahoma minors are only tried as adults if they are charged with first degree murder. Being charged as a youthful offender serves as a compromise between juvenile charges for nonviolent misdemeanors and adult charges for first degree murder. When a youthful offender turns 18, he or she is not released from custody, as is a juvenile delinquent. Rather, the youthful offender is transferred to the state penitentiary to serve the remainder of his or her term in prison. Sex crimes which result in a 15, 16, or 17-year-old being charged as a youthful offender include the following: * First Degree Rape ** Attempted First Degree Rape ** Rape by Instrumentation ** Second Degree Rape (a 15 year old is not charged as a youthful offender for this offense) * Lewd Molestation ** Forcible Sodomy Whether your child will be charged as a juvenile or a youthful offender is an important determination of what type of sentence, if any, he or she will receive. An attorney can work to certify a minor as a juvenile rather than a youthful offender, and your child’s lawyer should be dedicated to protecting your child from unnecessary conviction and sentencing.

https://www.lawfirmofoklahoma.com/practice-areas/juvenile-sex-crimes

Edit: formatting struggles