Whooo finally

The paladin change his in-game gender since the special ncp dislike male player and he can't change gender during the special quest

But when he re-spwaned he was a guy???

I think when he went to town, he was hoping it would be a disguise but backfired anyway. Then I think he needs to be in female form to slip into the crack to that underwater space.

He's built pretty much the same, just with added front in female form, I don't see how he HAS to be in fem form to be able to go in

Well spoiler alert, imo it's mostly because of the situation in the future where sunraku need the female form a lot in the fight, so I guess it's kinda the way the manga trying to make us get used to the female avatar

What I wanted to see more of his stupid antics in his birb form tho ;-;

well most of the time he will remain in male avatar but in combat mostly in female iirc, we'll see in the future

I PRAY THAT THEY DOWNSVALE SUNRAKUS BAZONGAS TO A SMALL MEDIUM

The female form comes with 2 benefits:
1) It reverse Sunroku stats going from glass cannon with low VIT and High AGI and LCK to High Vit, but low AGI and LCK. Though his lack of equipment due to the curse means he's not as tanky as he would like.
2) Only a few players know his female form, hence he use it to become inconspicuous. The knowledge about how you can change your gender is still not known in Shangri-La Frontier. (It's like the racial change which is also rare.)
Many players think of his female form as a weird Sunroku's wannabe fan.

The 2nd one makes sense but the 1st one was a different grail, which he did choose but the gender bending one is ALL it does

Nope.

Don't listen to the previous commenters. Because the real reason Sunraku does the quest in female form is because of RP. The paladin highly requested for Sunraku to be decent (not nude) in front of the Saintess and only the female form of Sunraku has this "decency".
Plus Sunraku chose the female form solely for disguise and a possible way to counter his contusion (Lycagon's mark) and be able to wear gear or costumes (which only made him not topless anymore but still unable to equip gears or costume).
Spoilers ahead, Sunraku won't be able to utilize his female form as a disguise anymore in the upcoming arcs because a lot of players will know about this in the New Land arc. So he only changes into the female form when he does RP as a girl (which doesn't happen a lot).
He doesn't use the female form mostly on his fights guys. Spoilers ahead, Sunraku gains a lot of transformations in the upcoming arcs. For example, the Bloody Maiden form IIRC. He doesn't really need to be on female form on this one because the form only requires the two specific weapons to be equipped at the same time.

this is true, well idk how they will implement the mourning dress/R.I.P gown in the manga but we'll see in the future, your comment is correct btw this is the true reason for the female form but I only see it as an introduction for the female avatar arc so good correctionヾ(❀╹◡╹)ﾉ~

He said when he dies and respawns he changes back to his male form