Just blood relative. There’s always her dad’s eye and she is also the daughter of an Indra transmigrate some of that special chakra was most likely passed to her. I don’t think she will be getting the Rinnegan but its a possibility if something happens to Sasuke and he gets a chance to pass it down. But realistically, I see her getting EMS at the most when she is older and, again, if something were to happen to Sasuke
thiers plenty of reasons why... one kishi doesnt just write gaiden for fucks and giggles... kakashi gaiden hinted obito being the bad guy...
sarada got 10 chapters and in those we get to see taka but jugo and possible parents. mitsuki was a test tube baby genetically modified to even endure SM at an young age. boruto we see cyborgs with the power of the gods.....
now
reason one sarada could potentially have senju or uzamki genes (kabuto was able to implant pieces of taka into him and naturally gained thier abilities) , i think during saradas birth sakura was targeted by rouge ninjas while she traveled with sasuke-kun, during the travels sakura was injured in that batttle with unborned sarada, we know sarada was born in one of oro hideout henece karin being the one to deliver sarada... the baby was in trouble as sakura was attack in the stomach area , the baby was endanged but in order to save sarada karin had to give or rather gift her the life force of an uzamaki/ adjust her dna make out. i mean kabuto went thru hell with oro essences and for a baby to go thru such a procedure is impossible... have uzamkai genes could allow her to awaken the rinnigan
reason two she gains EMS some how some way, then she does it the old fashion way she dies and comes back, oro has a drug that kills/ puts a person is a state of death for like 2 days (that how sasuke gains CM lvl 2) , then boom shes got rinnigans.
reason three on how she gains rinnigan , she takes madaras eyes and slowly progresses into the rinnigan
