how do you imagine the first time mereneth saw thranduils scars? did she know beforehand they were there or was it a surprise? and what about legolas same question?
Tbh I am not sure if you’re referring to the first time she EVER saw any of his scars, or if you’re asking about seeing them in Valinor specifically. So I’ll do my best to answer both.
By the time that Thranduil and Mereneth met, he’d already survived the attacks on Doraith twice, the War of Wrath, plus lord knows how many smaller battles over his lifetime. Mereneth knew about all of that; Thranduil had told her about it. Maybe not in great detail … but he'd told her. The thing is, most of the Silvans didn't really experience or participate in ‘Organized War’ the way the other elves did with eachother & with the forces of darkness. So it was difficult for her to really comprehend the scope of what he had already stubbornly survived through. Mereneth KNEW about the scars, but they were still a surprise.
The first time she saw most of Thranduils scars was…. Very emotional. For both of them.
For Mereneth her poor brain basically short circuited. To know and love Thranduil in one of the most lighthearted periods of his life, and then to see the evidence of what it had taken for him to get there was extremely difficult to fit together into one cohesive image. Especially because she worked with the Healers as a scribe and had a better idea than the average population about what kind of wounds would leave each type of scar.
He didn't need to tell her that he had been stabbed so deeply in the side, the hilt had almost been flush with his skin. He didn't need to explain the horrible infection he had gotten on his leg that could only be treated by cutting away the affected tissue. Or the slash wounds to his stomach that made it impossible to sit up on his own for weeks.
He didn't need to tell her because she could read it in the scars. It was (understandably) A LOT to take in all at once.
For Thranduil, Mereneth seeing his scars felt extremely vulnerable in a way it usually didn't. Usually, scars were scars. Things happened; warriors got hurt. The good or the lucky ones lived to get hurt another day & kept the evidence to remind them not to be stupid that way again. They were a sign that he had protected those he loved and stood up for things he believed in.
But when Mereneth looked upon them, he was not a warrior with scars. He was just Thranduil, with every worst day of his life written out on his skin for her to examine. He worried that it would be evidence of too much cruelty for Mereneth to still love him, because how could anybody live through such cruel things without being equally horrific? He worried that she would finally realize how broken he still was. That she would finally understand and come to agree that he was not worth her time.
It took a LOT of convincing on Mereneth’s behalf for Thranduil to beleive that if anyting, it only made her love him more.
The first time that she saw all of Legolas’ scars was (initially and externally) less emotional than when she saw Thranduil's. She had a MUCH better idea of what to expect and had done her best to brace herself to not react in any way that might make Legoals feel subconscious or judged or prevent him from sharing things with her in the future.
However, the longer she knew about them, the more she learned about some of the stuff that Legolas had lived through, the more it ‘haunted’ her in a way. She started having nightmares where she was forced to witness horrible things being done to Legolas but was unable to help or otherwise intervene in any way. Mereneth already felt guilty for dying and ‘abandoning’ her family, but that guilt would sometimes become almost crushing. The elfling she had been forced to leave behind had been so tiny and perfect and innocent… The elf before her now was a War Hero in a way even legends struggled to convey.
The scars were reminders of the thousands of things in his life she had missed. The thousands of times he could have used the comfort of his mother, and did not have it. The thousands of things she would never know about him. It was so …. Lonely.
While Thranduil, Ferdan, and Galion did their best to understand and help her through all her feelings, it was hard for them to really ‘get’ waht she was feeling since they were there the entire time. They got to witness Legolas slowly transfomr into the Elf that appeared on the shores of Valinor. I headcanon that Thranduils mother died when the dwarves attacked Thingol over the jewels, and so she also missed ………………. A Lot when it came to Thranduil’s life. The two of them I think would bond very deeply over this, and be important sources of support and comfort for eachother.