LONDON — In the days to come, anyone wishing to criticize Meghan Markle, the American actress set to marry into Britain’s royal family, will have to contend with Tshego Lengolo, an 11-year-old black girl and newly minted monarchist.

Tshego is a child of southeast London. She has taught herself “road,’’ the slang emanating from the city’s grime music scene, but drops it the second she enters her apartment, a zone patrolled by her all-seeing South African mother.

They squabble affectionately, for approximately the thousandth time, over whether she can be called Tiffany.

If Tshego is royal-crazy this summer, it is because Markle is biracial, the daughter of an African-American woman and a white man. When she looks at Markle, Tshego sees a version of herself, new to England, trying to find a place among its racial codes.

The precedent set by the wedding of Markle and Prince Harry next Saturday is often played down. White royalists, in many cases, argue that racism is no longer a serious problem in British society. (“The queen currently has an equerry,’’ or top aide, “who is black,’’ exclaimed royal commentator Dickie Arbiter, by way of evidence.)

Many blacks say the royal wedding is a distraction from the rise of intolerance and anti-immigrant nativism in Brexit-era Britain. But to Tshego, Meghan Markle is just flat-out thrilling.

She wants details. Is Markle’s hair naturally curly, and are there pictures? Will they hire a DJ to play at the wedding, and will that DJ play hip-hop?

Tshego cannot wait for the couple to have a baby, she says, because the baby will be partly African, like herself. She hopes against hope that the baby will have black hair.

“There is nothing that racist people can do about it,’’ she said happily. “So they might as well get used to it.’’

Tshego’s mother, Carol Lengolo, who grew up in a village in South Africa, was raised to love the British royals. Friends sometimes argue with her: Markle is so light-skinned she could pass as white, they say, and, anyway, what relevance does the royal family have in your everyday life? To these objections, Lengolo responds with a sweet, slow smile.

“For me it doesn’t matter: Her mom is African, so she’s African,’’ she said. “We are going to be in her corner. Because we feel like she is all alone. She needs people behind her, to say, ‘Sister, we are here, you are not alone. We are here. We are going to defend you.’ ’’

New Cross, where the Lengolos live, is not a neighborhood where you would expect to find great warmth for the queen. It is the source of some of London’s most influential music — reggae, ska, punk, and, more recently, grime — and of persistently high rates of violence.

Britain remains 87 percent white. Black people made up 3 percent of the population according to the most recent census, in 2011, many of them clustered in diaspora neighborhoods like New Cross.

The racial tension goes back generations.

In the 1970s, New Cross saw an influx of Caribbean workers invited to Britain for construction work. White immigrants bristled, and right-wing groups, like the National Front, began to march through the neighborhood.

Not far from Tshego’s house is a monument to racial division. In 1981, a house party on New Cross Road was engulfed in flames, leaving 13 young black men and women dead. Many people were convinced that racists had thrown a firebomb in the window, but a police inquest was inconclusive and no charges were brought.

Thousands of black Londoners gathered in protest, the beginning of race riots that rippled through the city.

In New Cross today, the London of the global super-rich seems both tantalizingly close and unreachable.

Kemi Moore, 17, said the 2016 campaign to leave the European Union had unleashed nativist feelings in white Britain.

An immigration crackdown has swept up thousands of British-born descendants of the Caribbean workers — now known as the Windrush generation — who do not have citizenship documents, stripping them of health and housing benefits.

“It brings back a lot of the things we thought we were past,’’ she said. As for the wedding, she gave a withering shrug. “No one in the younger generation cares about the royal family,’’ she said. “I feel like it’s more of a tourist attraction.’’

The hype around the wedding only makes her feel more alienated. “There is always a coverup issue they use to distract everyone from the real problem,’’ she said.