Strange Occurrences in a House After an Uncle's Death

Well, in short, this started happening recently, in August, but it seems to have gotten much quieter.
I was walking down the street when it all happened. My grandmother called me and said that my uncle had died (let's call him Zh). By the way, this uncle is her son and lived with her. Of course, as soon as I learned of the grief, I came to her and didn't move out again.
She lives in a private two-story house. She sleeps on the first floor, and Zh slept on the second, in the far room on the left. Passing by that room, from the first day I was enveloped by a strange feeling. Some mixture of fear, disgust, and a desire to go inside. Paradoxical, but that's how it is. Even in the basement, where he died, there weren't such feelings as there. But I didn't pay attention to those feelings. At least, not that day.
For the rest of the week I only came late in the evening, and the strange feeling that I wasn't alone here gripped me more and more. I didn't have the courage to talk about it with my grandmother. Plus, she drank very heavily after the death.
It got easier when Zh's ex-wife came from Moscow. Even though they had divorced, they still kept in touch. When she learned of the death, it hit her terribly.
On the third day was the funeral. We sat in the morgue that morning. Terrible feelings. His wife and I couldn't hold back tears, and grandmother had taken so many sedatives that she didn't shed a single tear. Strong woman.
Around 10 o'clock, when the body was already in the coffin, that girl received an email on her phone. From Zh. It said that he loved her very much, that after death they would all be together, and he would wait for her. That coincidence really stressed me out.

After the funeral it immediately felt easier. The three of us completely immersed ourselves in cleaning. And in the evening, mourning enveloped the ladies again. Only I sometimes bustled around with a guitar and tried to lift their spirits a bit.
Closer to 12, Sveta came to my room, and we started talking. And then I admitted that a strange feeling was gripping me on the second floor. By that time I already felt as if Zh was sitting there all the time, in his room. Or in the bathroom. But still, more in the room. Sveta confirmed that she felt exactly the same. She said, in tears, that she was scared.
I suggested she play a board game with me. We played for two hours, and during that time she noticeably calmed down. After that I suggested she sleep in the same bed tonight, and when we were already lying down, Sveta said she felt much better in my room. And I myself felt cozy and calm there. Always. The next morning grandmother told me that she prayed there every evening, and maybe that's why it was so good there. After that she gave me a rosary, and I started carrying it with me always, as a talisman.

One day Sveta ran out of the room where Zh slept, and where she decided to sleep, screaming. She said that when she came home at one in the morning, she first saw a second, extra shadow right behind her from the light. Going into the bathroom, she noticed a wisp of smoke in the reflection. And in the room she started talking to herself, thinking she was talking to Zh (though, who knows, maybe she really was talking to him, I've had that happen too. Maybe we just lost our minds from the death of a loved one). According to her, Zh said that he loved the three of us more than anyone, because we were the only ones who were the closest people to him. At the same time, Sveta's current husband received an SMS from an unknown number, which said that he must protect Sveta with all his heart. At the end of the dialogue, Zh said that if Sveta wants to be believed, she should tell grandmother "I am your servant of God". Sveta didn't know this, but Zh had been saying that phrase to me and grandmother all the time.

On the 40th day, not only the three of us but also my mother — Zh's sister — left the house with a candle. She didn't contact grandmother, personal dislike, but she got along well with me.
According to stories, it's believed that on the 40th day the soul is seen off, and before leaving it should give a sign. We didn't have that, but my mother saw it.
She called me the next day and told me that, coming out of the house, she saw a silhouette of a man. He was walking into the forest. But after turning away for a couple of seconds, she didn't see anyone anymore. At that moment, according to all traditions, it was 12.

After that, the heavy aura in the house and the feeling as if you're being watched instantly disappeared.