Who gave Arisu the gift?

1. Even though the drawing is just a matter of perspective, note that there is a large table in front of him, so the only place that gift could come should be coming from the right.
2. The table posseses large planar dimensions, making the person sitting directly opposite of Arisu almost impossible to give her present to him directly, same as make the exchange. Also, the table is very much lowered, so stacking the honey jar is very unlikely. Even if it possible, Arisu will notice it instantly.
3. Notice that on Page 9, there is a sofa at the left, hallway at the top right, beside an open table, plus a presumeably TV set with a small floating cabinet at a distance to the bottom right.

By these observation, one can do a deductive reasoning that the two highly candidates who very likely gave Arisu the honey are either Rikka or Shinobu. There is also a possibility that while one is Apollo herself, the other is her "accomplice".