Author has written 5 stories for Legend of Zelda.
I have a tumblr and a DeviantArt account. The link's don't work on this site, but I'm 'Gerudo-Spirit' on DA and 'gerudospirit' on tumblr.
Why I ship Yugilda
The relationship between Princess Hilda and Yuga is very complicated and full of contradictions. I believe Yuga was loyal to Hilda all along, or at least always had her best interests in mind.
My head canon is that Yuga was Hilda's attendant (kind of like Zelda has Impa). The prospect of a Princess having a powerful sorcerer as an attendant/adviser is just adorable. Evidence shows that they were relatively close and he had her complete trust. Ravio's diary suggests that Yuga was manipulative towards Hilda. You really have to wonder at who is the dominant one in the relationship. Certainly, Hilda is his boss, but Yuga still has sway over her.
1. Hilda trusted Yuga completely.
2. Yuga was quite fond of Princess Hilda and most likely actually loyal to her before the merge.
3. Ravio's Diary
His journal entries are very vague and he never states why he believes Yuga will betray Hilda. Did he have a prophetic dream? Did he spy on Yuga? We'll never know.
Given Yuga's obsession with beauty, selfishness, and lack of humility, it would only be natural for Ravio to suspect the worst of him. However, Ravio was just a bystander to Yuga and Hilda's plan. That doesn't make him the authority on Yuga's intentions, especially when Yuga himself spoke so highly of Hilda prior to the merge. To me, Ravio's comment sounds more like he perceived Yuga as someone who enjoyed his position as Hilda's attendant a little too much (a leech), even to the point of having his ego inflated by being so close to the Princess of Lorule.
Why I ship Ghirazel
Throughout the game Ghirahim makes comments about Zelda, calling her "adorable", "Her Majesty", "darling young girl".
There's also the small chance he was created for the sole purpose of finding her. When he is performing the ritual he says something to the effect of "I've waited my whole existence for this. This is my moment."
He works tirelessly to find her. He had his hopes raised and dashed so many times over the course of the game. He probably thought about her the entire time. Probably fantasized about how he could capture her. Because of this I think he'd have an odd sort of reverence for her since her soul is required to resurrect his master, maybe even bordering on desiring her for himself
I like to think about what could have been if he had managed to capture her earlier. What kind of interaction there could have been if she were conscious to talk to him. Most likely she'd be taken to be sacrificed right away, but I still like to imagine that he'd hold her captive for some time, being forced to care for her. I could imagine him flaunting his physique in front of her and her laughing at him. Because she is so important in fulfilling his goals, it would be rather short sighted of him to harm her in any way (aside from the ritual of course). If she were to die prior to the ritual, Ghirahim would be SOL, and he knows it. His happiness kind of hinges on her.
I have a headcanon that it was Ghirahim who was calling out to Zelda during the early parts of the game.