note: flower should probably be plural in all cases but FUCK fixing things

Ryouma: Welcome back...thank you for everything. Accept this flower, if it would please you.
Takumi: Welcome back. This flower...is for you. As a token of my thanks, take this.
Saizou: You're back. Accept this flower. It is...a symbol of my gratitude toward you, my wife.
Nishiki: Welcome baaack! I think the usual repayment for a favor is to prepare flowers, so I want you to accept this! (is this the right use for いつもの?)
Hinata: Uh...this flower shows my feelings of gratitude. I'd be happy if you'd do me the favor of accepting it...
Asama: Welcome back. I thought this flower might look good on you, but...please throw it away if you find it to be unnecessary.
Tsubaki: Welcome back. See, isn't this flower beautiful? It represents my feelings, so I want you to accept it.
Tsukuyomi: Welcome back. ...this flower is a sign of my gratitude. It'd be nice if you'd accept this.
Joker: Welcome back, my lord. I put all my feelings into this flower. I want you to accept this.
Cyrus: Welcome back, Kamui. This flower symbolizes my feelings. Accept it, please.
Suzukaze: Welcome back. On my way home, as I found this beautiful flower, I thought of you...
Marx: Welcome back. I think once in a while I'd like to give a gift, so I prepared this flower, but...this is embarrassing.
Leon: Welcome back. This flower should communicate my feelings to you. Will you understand the emotion that is in this flower? (unsure)
Benoit: Welcome back...this flower represents my gratitude...
Flannel: Welcome back! I present this flower to you. Seems to me that it's a pretty decent gift. (unsure)
Harold: Welcome back. I give you this flower! It is filled with my love and thanks...
Odin: So you've returned. This flower only blooms in the Lost City of El Dorado. It is a legendary flower...so please, accept this.
Lazwald: Welcome back! This...is a present from me. Surely, this flower suits you!
Zero: Welcome back. This...accept this. It is a flower given to lovers...surely you'll understand its meaning?
Hinoka: Welcome back. Uh...this flower is filled with my feelings for you. Please accept it...
Sakura: Welcome back. It might be strange to give a flower to a man, but...this symbolizes my feelings.
Orochi: You've returned. In this flower are this child's feelings. From now on, will you stay by this child's side? (note: "this child" = わらわ, an archaic way for noblewomen to refer to themselves, according to wikipedia)
Kagerou: Welcome back. I thank you for everything...in this flower are those feelings of appreciation...
Kazahana: Welcome back. This flower is a present from me. You'll accept it, won't you?
Setsuna: Welcome back...this flower that bloomed in the mountains...I'll give it to you.
Yuugiri: Welcome back, my lord. This flower contains my feelings toward you...please accept it.
Oboro: Welcome back. This flower is really pretty, so I thought I'd give it to you. Does that make you happy?
Felicia: Welcome back...this flower is a present...in the language of flowers, this is...eternal love.
Aqua: Welcome back. Today, I prepared this flower...I wanted my feelings for you to take a physical form.
Mozume: Welcome back. Uh...thank you, as always. This flower's worth comes from my feelings of gratitude. (unsure)
Camilla: Welcome back. I thought I'd give this flower to you. Thank you for everything...I love you.
Elise: Welcome baaack! Isn't this flower pretty? I love you, so it's a gift!
Charlotte: Welcome back. Isn't this flower next to me(?) pretty? It's a present from me. ま、たまにはね… (seems like a sort of "I'll only do things like this occasionally" or something)
Pieri: Welcome back! This flower's a present, okay? Thank you for always loving Pieri! (slightly unsure)
Belka: Welcome back...um, this flower...for you...
Luna: W-welcome back. ...eh? Th-this flower is...I didn't buy it for you!
Nyx: Welcome back. I give you this flower. It represents my feelings...
Kisaragi: Welcome back! There was this beautiful flower in the mountains, so I thought I'd bring it back to you!
Grey: Welcome back. This flower...is made of candy. Since I'm able to make them well...I thought I'd give it to you. (not exactly sure on the "made of candy" part...almost seems to weird)
Kinu: Welcome baaack! Take this flower! Thanks for everything! I love you!
Hisame: Welcome back. ...this flower is filled with my feelings for you. Please accept it.
Mitama: The flower I'm giving you is filled with gratitude from every day together...for you to accept this flower would make me happy...
Matoi: Welcome back. Please have...this flower. It is proof my love...
Shara: Welcome back. Accept this flower...it's proof of my eternal love.
Shigure: Welcome back. Um, this flower reminded me of you...so I brought it back.
Dia: Welcome back...there was this beautiful flower...so I thought you should have it...
Sophie: Welcome back! Hey, take this! This flower is filled with my feelings!
Midoriko: Welcome back. This flower is a gift from Midoriko.
Siegbert: Welcome back. This is a flower for a beloved wife. Thank you for everything. I love you.
Foleo: Welcome back. This flower...I picked it up. Just like you, isn't this flower beautiful? (unsure)
Ignis: Welcome back...this flower is a present...once in a while, I want to do something a husband should do...
Velour: Welcome back...please accept this flower...the color of its stem represents my gratitude.
Lutz: Welcome back! Please...accept this! I chose this flower while thinking of you!
Ophelia: Welcome back. This is a present from me. It is a flower that only blooms on moonlit nights...isn't it beautiful?
Soleil: Welcome back. I give this flower to you. Because it is from me...please cherish it. (unsure)
Eponine: Welcome back. This flower is a present. From here, may I love you freely? (unsure)
Yukimura: Welcome back. I am thankful for everything. I give this flower to you with feelings of deep gratitude.
Izana: Welcome back! This flower is a present for you. I think that surely you will like it...
Ashura: Welcome back. This flower...is for you. I thought it was pretty, like you...
Fuuga: You've returned. I would be happy for you to receive this flower. Preparing a gift like this is so unusual for me...
Gunther: You've returned. Ah, this flower...? I thought I'd buy you a gift...
Crimson: Welcome back! イカした花を見つけたから、あんたの分も買ってきたよ！　受け取りな。 (uhh...something about a squid...?)
Rinka: Welcome back. Th-this...pretty flower. I found it by chance, so...I give this to you.
Anna: Welcome back. Yes, this flower...you remember? If you collect a lot, you'll be even happier. (unsure)
Flora: Welcome back. This flower...please accept it. Only this kind of thing can truly express one's love. (unsure)