I love this ship. ♡
1. Their personalities go together really well. Spanner is calm and Shoichi tends to get nervous really easily so I can see them balancing each other out.
2. They look so adorable together and they’re both nerds.
3. Spanner never seemed upset at Shoichi when Iris and her monsters attacked them. He always believed in him and trusted him. And when Shoichi revealed he wasn’t an enemy and he started getting a stomach ache Spanner went over to him right away. Their relationship seems like it would be happy, healthy and normal.
The other ships involving both Spanner and Shoichi just don’t make sense. To me Spanner never seemed interested in Tsuna, besides his X-Burner ability. 10051 makes absolutely no sense, considering Shoichi wanted Byakuran dead.