solo time, i think he'd either practice boxing or go out, enjoy a nice hot cup of tea/lounge around and drink tea。
if we do like an au where sigewinne is his daughter, then he'd indulge in some daddy-daughter time where he sits down and lets her glam him all up (like apply makeup w those kid makeup kits and he'd be fucking COVERED in glitter)。
as for spending some time with my s.i, cuddling, making meals together or hearing my s.i read their books aloud to him。（＾_＾）