How they first met: They first met when Phoebe joined the Elite Four. Sidney was the most junior member prior to her, so he was assigned with giving her her orientation for her first day. The two hit it off right away and Sidney was pumped to have another more energetic and upbeat coworker since he didn’t get along as well with the others.
Where their first date was: The two started dating pretty quickly after first meeting, their first date being about a month after Phoebe joined the E4. She had kept trying to start a weekly ‘Bar Night’ with her coworkers to try and bond with them better, but only Sidney ever showed up. On the fourth week of only him taking her up on her offer, Phoebe, in a bit of a huff, just said ‘Well, with only us two we might as well make this a date!’ and that was that. They spent the evening having fun chatting and drinking, finding more and more shared interests, then retired to Sidney’s apartment for the night.
When they had their first kiss: They had their first kiss on their first date. It was raining when they left the bar and neither of them had brought umbrellas, so Sidney draped his leather jacket over Phoebe’s shoulders. She was so touched by the gesture (and still quite tipsy) that she grabbed him by the lapels and pulled him down for a smooch. The person behind them trying to leave had to ask them to take their makeout session somewhere other than the doorway.
Who cooks: Phoebe mostly cooks, but that’s mainly since Sidney fell in love with the Alolan recipes she learned from her grandparents the first time she cooked for him. When he does cook, though, Sidney likes to show off his skills in the kitchen by being dramatic with everything he does – juggling ingredients, spinning around while flipping omelets, cracking eggs with one hand, etc. Phoebe always is a wonderful audience, clapping and cheering for all his tricks, which he loves. Both of them (and both their kids) also love spicy food, and have one of those giant jugs of hot sauce lovingly displayed in the center of their dinner table. 
Who proposed: Sidney proposed. He chose to do so while they were on a date at the bar where they first started going out together. It was a pretty traditional proposal all things considered – he steered the conversation towards their relationship and when he felt the time was right, got down on one knee and asked Phoebe to marry him. She was so excited she fell off her bar stool! Luckily her new fiance was there to catch her.
The dominate one: Both are about equally dominant and frequently switch up who takes that role. Sidney loves his wife’s devious side and Phoebe loves when Sidney takes control, so switching things up works out wonderfully for them.
Their favorite pastime together: Both love battling, both together at the Battle Frontier or against each other, but otherwise they usually like to go to any kind of high-energy event, especially concerts. The two of them both love headbanging rock music (and similar genres) and get really excited whenever their favorite bands are in town. Phoebe is on the shorter side, so her husband will put her on his shoulders so she can see the band. They always end up screaming themselves hoarse from all the cheering and singing along. On the quieter side, Phoebe managed to get Sidney into gardening. She herself picked up the hobby from learning to care for Mt. Pyre from her grandparents, so she passed on her love of tending the soil to her husband. Their house is covered in window boxes and climbing vines, with plenty of Phoebe’s favorite – rose mallow. Sydney prefers to carefully cultivate his little succulent garden (and protect it from Phoebe’s Sableye, who seems to love digging up the dirt on her search for tasty stones) which Phoebe isn’t as impressed by since none of them have pretty flowers, but she still loves that she got him into gardening in the first place.
Who kissed who first: Phoebe kissed Sidney!
Who is the flirt: Sidney, hands down. He uses really cheesy lines as well. Or song lyrics. Phoebe thinks he’s such a nerd.
Who is the romantic: Phoebe! She likes planning out all their dates, though sometimes can go a bit over the top with her romantic ideas (no, Phoebe, a three-week vacation to tropical Oblivia is not realistic when you both have demanding government jobs). She also gets a lot of her romance tips from her ghost friends, so some of her romantic ideas are….. old-fashioned. Sidney finds that side of her charming, though, since he’s always loved how Phoebe is so friendly with the spirit world.
Who wakes up first: Sidney usually wakes up first. Phoebe is a night owl who always ends up sleeping late, so she relies on her husband to make sure she’s up on time for work each morning.
Who comforts who the most: Sidney usually comforts Phoebe more, since taking care of Mt. Pyre can be very taxing for her – taking care of all those lost souls and comforting grieving families. Phoebe always tries to be cheerful and upbeat, so when she does start feeling down from her work, her husband is always there to lend a shoulder and let her know it’s okay to cry if she needs to. Phoebe, on her part, always makes sure Sidney knows she’s there for him, especially when his family issues come up.
The cuddler: Phoebe, for sure. She loves to curl up to her husband, though he doesn’t always appreciate since she has a lower body temperature as a dark mage. Freezing cold feet aren’t ever fun. Phoebe always insists that just means he needs to warm her up and then it wouldn’t be a problem.
The big spoon: Sidney, by virtue of being taller (not that it’s hard to be taller than Phoebe).