Tie: Shinju chest harness

Based on this tutorial

1. Complete a lark's head and half-hitch around the chest. This gives 2x2 wraps above the chest. Ensure the half-hitch is adjusted to point down from the knot.
2. Leaving a little slack, wrap once around the chest under the breasts all the way back to the centre of the back.
3. Pull the rope through the start of the wrap and adjust the slack so that the upper and lower wraps are connected by a short vertical stem.
4. From here, it's essentially another lark's head and half-hitch but with previous step instead of a lark's head. The rope should be leaving the half-hitch going upwards.
5. Wrap once around the stem and take the rope under the top set of wraps and over the right shoulder. This reinforces the stem and stops it from disappearing when the rope is under tension.
6. At the front, take the rope from the shoulder (on the left now) and bring it diagonally down and across the chest to the bottom set of wraps.
7. Slightly past the center (to the right as you face it), bring the rope over the bottom set of wraps then back up between the wraps and the chest, coming out to the left of the incoming diagonal.
8. Bring the rope to the opposite shoulder going under the top wraps. Be careful that tension on the rope does't cause the bottom wraps to bunch up. If there is a lot of space between upper and lower wraps, you might want to wrap the earlier diagonal once to help prevent that space from closing.
9. Coming to the back, take the rope over the shoulder and down under the top set of wraps
10. Reverse direction by pulling the rope over to the other side and lock it off with a half-hitch (or two) on the upper wraps.

Tie: Wrists behind neck

Based on this tutorial.

1. Tie the wrists using e.g. Lark's Head Double Column Cuffs.
2. Bring the wrists over the head and pull down so that the tail of the rope is going down the centre of the back.
3. Take the tail of the rope off to one side and wrap around the front and back to the back.
4. Pull the tail between the back and the vertical rope and then down over the start of the wrap to form a cross.
5. Adjust the rope so that the cross is centered and the rope is tensioned as desired.
6. Wrap back again in the opposite direction (under or over the existing wrap).
7. Bring the tail through the bight formed in step 6.
8. Tie it off in a half-hitch on the opposite side.
9. Optionally use the spare rope to pull the wrists tighter.

If the wrists are not pulled far enough back, it is quite possible that the bottom can slip their head through an arm and get their elbows down. Pulling them back tightly may make this tie intolerable. Instead you can use more rope on the arms to make it impossible for the head to pass through.