How do you marry Dorothy?

To marry Dorothy, you have to complete all her requests, and when she reaches 10 hearts, Gordon will put up a request. He will ask you to give Dorothy a Blessing pendant. When you give it to her, she will talk to you, and ask you what she should do for what she's feeling. The choices are "Try holding your breath," and "Will you marry me?" Obviously, you want to choose "Will you marry me?"

Does it work also on cecielia?

First of all, the blessing pendant does NOT work on cecielia. Second, I married Dorothy and "greaterfiend" had all the main points, but also if you want to speed it up here are a couple tips.
-Dorothy loves Char... Char is a fish that can be caught at Blessia Island Center(about 30% chance of getting char, 60%some other fish that I forget the name, and 10% branch)
-Gorden loves pumpkins. I don't know how much of his friend you have to be to get the pendant, but you can buy pumpkin seeds at the store, and grow them at Blessia island.
-Finally, you should do any festival activity you can with her. She hangs out on the crossroads, on the path to triste forest during festivals.
I was able to marry her on Summer 9 of the first year(I proposed summer 8) I could have done it sooner if I had figured out where to get the Char sooner.

Why dosnt anyone know how to marry mana? Like I guessed the 10 hearts thing but geting the engagement ring.... It's so frusterating

to marry mana u have to have ten love points and 3 friend points with douglas

and you have to fight his scary humungous orc dude

One other thing about Dorothy...Gordon does not need any Fp to get the 'Pendant', Because It's a request and Fp goes up with each request. With Dorothy when you complete her request's her Lp Goes up I got 10 Lp in 12 days (Rf time)

Oh so thats how Can you get mmarried in the second generastion

To marry Mana you have to do ALL of Mana's and Douglas' requests.Once you get to Douglas' last request you end up talking to him at the top end of Trieste Forest and while you're talking to him an ORC appears and you have to fight it with Douglas watching. Once you have defeated it, Douglas will come over and says that he has never seen you fight and that you would be a good husband for Mana. He then gives you the ENGAGEMENT RING and then you can propose to Mana.