Ja, Latifa weet dat Rio de reïncarnatie is van Amakawa Haruto.
Rio / Haruto Amakawa
Her adopted brother, she also developed feelings for him, knowing that he is also a reincarnate of Amakawa Haruto in previous life.
In Seirei no Tami, Rio finally took Latifa as his own adopted sister and they lived together. During this time Latifa confessed to Rio how she had actually reincarnated from her world and was surprised by Rio who replied that he knew already.
輪廻の勿忘草, Seirei Gensouki 10 - Rin'ne no Wasurenagusa?) is the 10th installment of the Seigensou Light Novel Series, it revolves in the aftermath after Rio took Amakawa Haruto as his official name, revealing his Identity to Miharu, and about Takahisa and Aki that tried to take Miharu away from Rio by any means necessary.
Flora, in a state of panic, called for help. Rio caught up with Lucius and they revealed their past, while Flora listened to everything and confirmed that Haruto was actually Rio, discovering that the latter was royalty from another country.
Until they turned the age of seven, Haruto and Miharu were childhood best friends and inseparable. Before their parting, Haruto promised Miharu they will see each other again and marry.
Later on, Rio returned to the West with a new identity by using his previous life's name Haruto Amakawa. After the events that occurred during the invasion of Greille by the summoned hero Sakuraba Erika, Rio is recognized once again as a transcendent being by the World.
When asked by Miharu and Rio if Aki wanted to meet him, she quickly agreed. During this conversation, Rio revealed to her that he was Haruto's reincarnation. Aki reacted with denial, screaming in anger and asking why he had to tell her now and why he couldn't let her see him as just her savior.
Flora fell in love with Rio during they're academy days and always wanted to be with him, same as her sister, she felt guilty because they couldn't do anything to help him back then.
Rio is Celia's childhood friend and current love interest. She first met Rio in the slums, when she was searching for the kidnapped Princess Flora.
However, Rio easily took her down and released her from being a slave. Confused and still unable to believe this, Latifa instinctively followed Rio having no idea where to go. Due to Rio pitying Latifa and her young age he decided to accompany her to Seirei no Tami and part ways then.
In the anime, it may seem like Rio is completely indifferent around Miharu, but in reality it's quite the opposite.In the light novel, he blushes, and his heart races whenever she's near him. He was very sad and depressed when Miharu told him that she couldn't sleep with him because she already loved another boy.
Unbeknownst to Rio, the cell phone was registered to him and his repeated calls allowed Interpol to trace his location, resulting in his arrest.
Latifa, a young beastkin assassin, is tasked to hunt and kill Rio. Rio defeats Latifa and frees her from the magic spell that forced her to obey her masters. The two start traveling together. Rio is attacked by the beastkin of the Forest of Spirits when they assume he kidnapped Latifa (merely because he is human).
Asuka Mishima (御島 明日香, Mishima Asuka) is Haruto's neighbor and classmate after his transfer to Tokyo. Following Kyousuke's death and Haruto and Yuzuki's decision to stop seeing each other, she and Haruto begin dating.
Rio/Haruto is the strongest but hasn't reached his original power level yet.
Beth & Rio Sleep Together for the Last Time! Good Girls (Season 2) | Screen Bites - YouTube.
However, Flora is a kind girl, and wants to do her best to help people whenever a problem presents itself. She has often given a helping hand, as she is very smart and thorough in her work with plants.
It is revealed to be Helia. As he walks towards Flora he takes her hands and they have a heartwarming hug. He reaffirms his love for her, revealing that she is the only one he truly loves and they dance together.
TLDR: Yes Miharu is more than suspicious that Rio is Haruto due to Aisha spoiling things but Miharu doesn't 100% confirm it till later. not officially in season 2. it's shown the reveal at the end of last scene of the final episode of the season, but it's like spoiler for season 3.
Haruto Amakawa
The father took Haruto and disappeared from her life letting her completely devastated. Aki puts all the blame on Haruto, thinking he was a liar (she didn't know it was her mother's fault). She kept her grudge even when she was summoned to another world.
Iris is in love with Haruto, even though he harbors no romantic feelings for her at all. Giselotte's second son. He is initially arrogant and prideful before losing to Haruto in a duel and gains respect for him. Laius is unaware that Haruto is his older brother.
Thinks become more clear in volume 4 when rio mentions miharu as the girl he loves and him wanting to confess his undying love to her. He also thinks about miharu when asked about the things that he loves the most and cherishes.
Amakawa Haruto, a twenty year old university student, loses his life when the bus he is on gets into an accident. As his consciousness begins to fade, his one regret is not telling his childhood friend, Miharu, how he felt.
Haruto Amakawa (天川 春人, Amakawa Haruto) / Rio (リオ)
Haruto Amakawa was a Japanese college student who died in an unfortunate bus accident and reincarnated as Rio, an orphan from the slums of the Beltrum Kingdom's capital, Beltrant.