|“||Such a shame. Your wedding was the last thing I was living for. I lost a grandson, but you, you've lost the love of your young life. Poor child.||”|
|— Rose to Betty (thinking she was Polly)[src]|
Rose is the mother of late Claudius and Clifford Blossom, both of whom were killed by her daughter-in-law, Penelope, with poison. She is the grandmother of Clifford's two children, Cheryl and Jason, the latter also being deceased. She is also the great-grandmother to Jason's and Polly's twin babies, Juniper and Dagwood.
Rose moved in with Cheryl and her daughter-in-law Penelope in their new home, Thistlehouse after Cheryl destroyed their former residence, Thornhill. Rose, the rightful owner of Thistlehouse, soon became victim to Claudius' and Penelope's schemes, first being poisoned with tannis root, followed by being pushed, at least according to Cheryl, down the stairs leaving her in a critical state in the hospital. She's since recovered enough to be released from the hospital and remains at Thistlehouse, under the ever-watchful eye of Claudius.
Fairly little is known of Rose's early life. What is known, is her affection for Polly Cooper. She took a liking to Polly as the young lady dated Jason, her grandson. At some point during their relationship, Rose gifted Polly with a ring that had been in the Blossom family for generations.
Nana Rose and Cheryl are called over to the Five Seasons by Betty, along with Fred and Sierra to discuss with them the patients from the Sisters of Quiet Mercy, who have been orphaned. While Betty has been housing them, that has become untenable. So, she’s called them over to ask for shelter just until the Sisters testify against Hiram Lodge. Fred agrees to take in some of the boys since he has the room now that Archie is gone. Rose also agrees. She’s saved many children from there before and will gladly do so again. With that, Nana Rose and Cheryl will board some of the girls at Thistlehouse. While all Sierra has to offer is a pullout couch, she agrees to take in a couple too.
After discovering that Claudius had died while in his cell, the Blossoms hold Claudius’ funeral at Thistlehouse. Rose, Penelope, Cheryl, and Toni are in attendance. At the podium, Penelope states that Claudius was never welcomed to Riverdale and that this is likely why he killed himself. Betty takes a seat next to Nana Rose, who is unconvinced by Penelope’s supposed grief, calling her out for having "crocodile tears".
While trimming the flowers outside Thistlehouse, Nana Rose is approached by Cheryl who is in search of Toni. Rose hadn’t seen Toni since she gave her an envelope of money for rent.
Nana Rose wakes Toni up to warn her that the hunt is afoot at the Thornhill Nature Preserve, and Archie, Betty, Veronica, and Jughead are the hunted. It’s up to Toni to save them, but first, Toni must save Cheryl.
Just outside Thistlehouse, Toni has rallied the Pretty Poisons and Southside Serpents in preparation to storm the Farm and retrieve Cheryl. Much to their surprise, Cheryl has already escaped. She joins them, handing Juniper off Peaches 'N Cream, who hands her off to Nana Rose. Cheryl runs into Toni’s arms and they kiss. Cheryl asks where is Betty. Nana Rose replies that she’s being hunted at Thronhill with all the others. Penelope has been planning this for weeks. It’s the grand hunt. With little time to spare, the Poisons and Serpents ride out.
Rose is an elderly woman with a frail body, pale skin, and white hair, with a red streak. Notably, Nana Rose has what appears to be some kind of eye condition, possibly blindness as her left eye is a milky-white color, while her right eye is hazel, and looks perfectly fine. Unsurprisingly, she's known to wear clothing that one would expect an elderly person to wear, such as wool sweaters and long, dark-colored skirts.
Having been diagnosed with dementia, Nana Rose suffers from extreme delusion and memory distortion. At Jason's memorial, she confused Betty Cooper, for her sister, Polly, who was engaged to Jason prior to his death. According to Cheryl, Rose comes from a gypsy bloodline, which she believes allows her to predict the gender of a woman's unborn child, specifically Polly's child. However, Rose later revealed that Polly was having twins, one of each gender which had been revealed during a conversation between Cheryl and Betty. This prediction later came true although the means in which Rose managed to make this prediction remains unknown.
Rose is quite accepting when she met Polly with Jason when she gave Jason the family wedding ring. Despite Polly being a "Cooper", she didn't seem to care. As if the only thing that mattered to her is that they both loved each other very much.
Despite not having many scenes together, it is implied Rose cares greatly for her grandchild Cheryl, after having informed Toni Topaz of Cheryl's whereabouts after she was admitted to the Sisters of Quiet Mercy by Penelope. She immediately in a lucid state agreed to house some of the Sisters Of Quiet Mercy escapees, showing disdain for that place despite adopting her future daughter-in-law Penelope from there.
- See also: Category:Images of Rose Blossom
Season 1 Screencaps
Season 2 Screencaps